Towns and Countries in English and Welsh
In Wales - All official documentation including roadsigns and normally provided in both the Welsh and English languages. You usually find Welsh first and English second. However, you will occassionally
encouter issues with incomplete translations, often involving place names written in Welsh, incorporated into the English translation e.g "Welcome to Aberhonnddu," "Yr Wydda is a Mountain" or "Ynys Môn is a Welsh Island".
In order to keep the list down to a manageable size, I have not included locations which use the same name in both languges.
The spelling of some Welsh words can change slighty, depending on the context of a sentence. However, they are usually "close enough" for a non native speaker to find the correct entry in this list. Here is an example - The town with the English name of "Pembroke" has
two possible Welsdh translations - either "Penfro" or "Benfro"
The list below provides a handy translation tool for Place Names, Towns and Countries.
| Welsh | English form |
| Abaty Cwm-hir | Abbey Cwm-hir |
| Aber-bach | Little Haven |
| Aberbargod | Aberbargoed |
| Aberbîg | Aberbeeg |
| Aberchwiler | Aberwheeler |
| Aber-craf | Abercrave |
| Abercynffig | Aberkenfig |
| Aberdâr | Aberdare |
| Aberdaugleddau | Milford Haven |
| Aberfal | Falmouth |
| Aberglasne | Aberglasney |
| Abergwaun | Fishguard |
| Abergwenffrwd | Whitebrook |
| Aberhonddu | Brecon |
| Aberllydan | Broad Haven |
| Aberllynfi | Three Cocks |
| Aber-miwl | Abermule |
| Aberogwr | Ogmore-by-sea |
| Aberpennar | Mountain Ash |
| Aberplym | Plymouth |
| Aberriw | Berriew |
| Abertawe | Swansea |
| Aberteifi | Cardigan |
| Abertyleri | Abertillery |
| Acstyn | Axton |
| Affganistan | Afghanistan |
| Afon Gweryd | Forth river |
| Allteuryn | Goldcliff |
| Alltmelyd | Meliden |
| Amwythig | Shrewsbury |
| Antigua a Barbuda | Antigua and Barbuda |
| Arberth | Narberth |
| Ardd-lin | Arddleen |
| Awstralia | Australia |
| Awstria | Austria |
| Bae Cinmel | Kinmel Bay |
| Bae Colwyn | Colwyn Bay |
| Bangor Is-coed | Bangor-on-Dee |
| Bangor Uchaf | Upper Bangor |
| Bargod | Bargoed |
| Bedwellte | Bedwellty |
| Begeli | Begelly |
| Belarws | Belarus |
| Belffast | Belfast |
| Bers | Bersham |
| Biwmares | Beaumaris |
| Blaenau | Blaina |
| Blaendulais | Seven Sisters |
| Blaen-y-cwm | Mountain Air |
| Bochrwyd | Boughrood |
| Bosnia a Herzegovina | Bosnia and Herzegovina |
| Bracla | Brackla |
| Bradle | Bradley |
| Brasil | Brazil |
| Breudeth | Brawdy |
| Brychdwn | Broughton |
| Bryn Bach | Bache Hill |
| Brynaman Isaf | Lower Brynaman |
| Brynbuga | Usk |
| Brynffordd | Brynford |
| Brynhyfryd | Summerhill |
| Bryste | Bristol |
| Bugeildy | Beguildy |
| Bwcle | Buckley |
| Bwlgaria | Bulgaria |
| Caer | Chester |
| Caercolyn | Colchester |
| Caerdydd | Cardiff |
| Caerfaddon | Bath |
| Caerferes | Dumfries |
| Caerffili | Caerphilly |
| Caerfuddai | Chichester |
| Caerfyrddin | Carmarthen |
| Caergaint | Canterbury |
| Caergrawnt | Cambridge |
| Caergybi | Holyhead |
| Caerhirfryn | Lancaster |
| Caeriw | Carew |
| Caerliwelydd | Carlisle |
| Caerllion | Caerleon |
| Caerloyw | Gloucester |
| Caerlwytgoed | Lichfield |
| Caerlŷr | Leicester |
| Caermincip | Saint Albans |
| Caersallog | Salisbury |
| Caerwrangon | Worcester |
| Caerwrygion | Wroxeter |
| Caerwyntr | Winchester |
| Caerwysg | Exeter |
| Caint | Kent |
| Cantref Coch | Forest of Dean |
| Capel Isaf | Lower Chapel |
| Capel Newydd | Newchapel |
| Capel Uchaf | Upper Chapel |
| Carneddau Teon | The Stiperstones |
| Cas-bach | Castleton |
| Cas-fuwch | Castlebythe |
| Cas-gwent | Chepstow |
| Cas-lai | Hayscastle |
| Casllwchwr | Loughor |
| Cas-mael | Puncheston |
| Casmorys | Castle Morris |
| Casnewydd | Newport (Gwent) |
| Casnewydd-bach | Little Newcastle |
| Castell Caereinion | Castle Caereinion |
| Castellmartin | Castlemartin |
| Castell-nedd | Neath |
| Castellnewydd | Newcastle |
| Castellnewydd Emlyn | Newcastle Emlyn |
| Castell-paen | Painscastle |
| Cas-wis | Wiston |
| Catffrwd | Catbrook |
| Catraeth | Catterick |
| Cefn Hirfynydd | Long Mynd |
| Cefn Mabli | Cefn Mably |
| Cefn-y-pant | Pantside |
| Cegidfa | Guilsfield |
| Cei Connah | Connah's Quay |
| Cei Lawrenni | Lawrenny Quay |
| Ceinewydd | New Quay |
| Ceintun | Kington |
| Cei’r Trallwng | Pool Quay |
| Celstryn | Kelsterton |
| Cemais Comawndwr | Kemeys Commander |
| Cemais Isaf | Kemeys Inferior |
| Cendl | Beaufort |
| Ceri | Kerry |
| Cernyw | Cornwall |
| Chwitffordd | Whitford |
| Cilâ | Killay |
| Cilâ Uchaf | Upper Killay |
| Cilfái | Kilvey |
| Cilgeti | Kilgetty |
| Cilgwri | Wirral |
| Cil-y-coed | Caldicot |
| Ciwba | Cuba |
| Cledan | Cleddon |
| Cleidda | Clytha |
| Cleirwy | Clyro |
| Clud | Clyde |
| Clun | Clyne |
| Cnwclas | Knucklas |
| Coed Gwent | Wentwood |
| Coedcernyw | Coedkernew |
| Coed-duon | Blackwood |
| Coedelái | Coed-ely |
| Coed-llai | Leeswood |
| Coedybrenin | Kingswood |
| Coed-yr-iarll | Earlswood |
| Coety | Coity |
| Cofentri | Coventry |
| Comin Llanddinol | Itton Common |
| Comin Llanfihangel Troddi | Mitchel Troy Common |
| Congo Gweriniaeth Ddemocrataidd | Democratic Republic of Congo |
| Côr y Cewri | Stonehenge |
| Corneli Waelod | South Cornelly |
| Corntwn | Corntown |
| Creseli | Cresselly |
| Croes Cas-lai | Haycastle Cross |
| Croes Cwrlwys | Culverhouse Cross |
| Croesoswallt | Oswestry |
| Crucadarn | Crickadarn |
| Crucywel | Crickhowell |
| Crug | Crick |
| Crugion | Criggion |
| Crymlyn | Crumlin |
| Crynwedd | Crinow |
| Cryw | Crewe |
| Cwmbrân Uchaf | Upper Cwmbran |
| Cwmclydach | Clydach Vale |
| Cwmdâr | Cwmdare |
| Cwmheiob | Cwmheyope |
| Cwm-iou | Cwmyoy |
| Cwmogwr | Ogmore Vale |
| Cwm-twrch Isaf | Lower Cwm-twrch |
| Cwm-twrch Uchaf | Upper Cwm-twrch |
| Cwmtyleri | Cwmtillery |
| Cyffordd Llandudno | Llandudno Junction |
| Cynffig | Kenfig |
| De Affrica | South Africa |
| De Georgia | South Georgia |
| De Korea | South Korea |
| De Sudan | South Sudan |
| Denmarc | Denmark |
| Derwen-fawr | Broad Oak |
| Derwen-gam | Oakford |
| Din Gwrygon | The Wrekin |
| Dinas Eidyn | Edinburgh |
| Dinas y Deri | Derry (Londonderry) |
| Dinas y Fatican | Vatican City |
| Dinas y Garrai | Doncaster |
| Dinbych | Denbigh |
| Dinbych-y-pysgod | Tenby |
| Doc Penfro | Pembroke Dock |
| Doc y Barri | Barry Dock |
| Dofr | Dover |
| Domen Ddu | Black Mixen |
| Drenewydd Gelli-farch | Shirenewton |
| Dŵr Cwmwdig | Cwmwdig Water |
| Dwyrain Aberddawan | East Aberthaw |
| Dwyrain Canolbarth Lloegr | East Midlands |
| Dwyrain Timor | East Timor |
| Dyfnaint | Devon |
| Dyfnant | Dunvant |
| Dyrham | Durham |
| Efrog | York |
| Eglwys Fair y Mynydd | Saint Mary Hill |
| Eglwys Newydd | Newchurch (Blaenau Gwent) |
| Eglwys Wythwr | Monington |
| Eglwys y Drindod | Christchurch |
| Einsiob | Evenjobb |
| Eneu'r-glyn | Energlyn |
| Erbistog | Erbistock |
| Ergyng | Archenfield |
| Erwyd | Erwood |
| Eryri | Snowdonia |
| Eutun | Eyton |
| Faenor | Vaynor |
| Faerdre | Vardre |
| Felinganol | Middle Mill |
| Felin-newydd | New Mills |
| Ffiji | Fiji |
| Ffordun | Forden |
| Ffrainc | France |
| Ffrwd Glyn-hir | Glyn-hir Waterfall |
| Ffwl-y-mwn | Fonmon |
| Ffwrnais | Furnace |
| Ffynnon Taf | Taff's Well |
| Ffynnon-groes | Crosswell |
| Fietnam | Vietnam |
| Gelli-aur | Golden Grove |
| Gellifedw | Birchgrove |
| Glan-bad | Upper Boat |
| Glandŵr | Landore |
| Glan-miwl | Glan-mule |
| Glannau Merswy | Merseyside |
| Glantwymyn | Cemaes Road |
| Glanyfferi | Ferryside |
| Glan-y-môr | Seaside |
| Glanyrafon | Riverside |
| Glyn Nant-y-glo | Coalbrookvale |
| Glynebwy | Ebbw Vale |
| Glyn-nedd | Glynneath |
| Glynrhedynog | Ferndale |
| Goetre-hen | Coytrahen |
| Gogledd Corneli | North Cornelly |
| Gogledd Korea | North Korea |
| Gogledd Macedonia | North Macedonia |
| Gorllewin Aberddawan | West Aberthaw |
| Gorllewin Canolbarth Lloegr | West Midlands |
| Gresffordd | Gresford |
| Guinea Gyhydeddol | Equatorial Guinea |
| Gwaeddel | Weythel |
| Gwaunyterfyn | Acton |
| Gwenfô | Wenvoe |
| Gwenlloc | Much Wenlock |
| Gweriniaeth Canolbarth Affrica | Central African Republic |
| Gweriniaeth Dominica | Dominican Republic |
| Gwlad Belg | Belgium |
| Gwlad Groeg | Greece |
| Gwlad Pwyl | Poland |
| Gwlad Thai | Thailand |
| Gwlad yr Iâ | Iceland |
| Gwlad yr Iorddonen | Jordan |
| Gwlad-yr-haf | Somerset |
| Gwndy | Undy |
| Halchdyn | Halghton |
| Hawy | Howey |
| Helygain | Halkyn |
| Hen Golwyn | Old Colwyn |
| Hen Ystog | Old Churchstoke |
| Hendy-gwyn ar Daf | Whitland |
| Henffordd | Hereford |
| Hengastell | Oldcastle |
| Henlland | Hentland |
| Heol Abertawe | Swansea Road |
| Hwlffordd | Haverfordwest |
| Hwmbr | Humber |
| Hwngari | Hungary |
| Hwytyn | Whitton |
| Hywig | Howick |
| Irac | Iraq |
| Isatyn | Hyssington |
| Iwerddon | Ireland |
| Lacharn | Laugharne |
| Landimôr | Landimore |
| Larnog | Lavernock |
| Latfia | Latvia |
| Lawrenni | Lawrenny |
| Lecwydd | Leckwith |
| Lerpwl | Liverpool |
| Libanus | Lebanon |
| Lithwania | Lithuania |
| Llai | Llay |
| Llanandras | Presteigne |
| Llanarfan | Saint Arvans |
| Llanbedr Felffre | Lampeter Velfrey |
| Llanbedr Pont Steffan | Lampeter |
| Llanbedr-y-fro | Peterston-super-Ely |
| Llanbugnal | Ballingham |
| Llanbydderi | Llanbethery |
| Llancatal | Llancadle |
| Llancein | Kentchurch |
| Llancrug | Kenderchurch |
| Llanddewi Cil Peddeg | Kilpeck |
| Llanddewi Felffre | Llanddewi Velfrey |
| Llanddewi Nant Hodni | Llanthony |
| Llanddewi Ysgyryd | Llanddewi Skirrid |
| Llanddingad | Dingestow |
| Llanddinol | Itton |
| Llanddunwyd | Welsh Saint Donats |
| Llandeglau | Llandegley |
| Llandeilo Bertholau | Llantilio Pertholey |
| Llandeilo Ferwallt | Bishopston |
| Llandeilo Gresynni | Llantilio Crossenny |
| Llandewi | Much Dewchurch |
| Llandochau | Llandough |
| Llandrillo-yn-Rhos | Rhos-on-Sea |
| Llandrindod | Llandrindod Wells |
| Llandudoch | Saint Dogmaels |
| Llandudwg | Tythegston |
| Llandŵ | Llandow |
| Llandyfái | Lamphey |
| Llandysilio | Four Crosses |
| Llaneirwg | Saint Mellons |
| Llanelwy | Saint Asaph |
| Llaneurgain | Northop |
| Llanfable | Llanvapley |
| Llan-faes | Llanmaes |
| Llan-fair | Saint Mary Church |
| Llanfair Cilgedin | Llanfair Kilgeddin |
| Llanfair Llythynwg | Gladestry |
| Llanfair-ym-Muallt | Builth Wells |
| Llanfarthin | Llanmartin |
| Llanfeuthin | Llanvithyn |
| Llanffa | Llampha |
| Llan-ffwyst | Llanfoist |
| Llanffynhonwen | Chirbury |
| Llanfihangel Dyffryn Arwy | Michaelchurch-on-Arrow |
| Llanfihangel Troddi | Mitchel Troy |
| Llanfihangel y Bont-faen | Llanmihangel |
| Llanfihangel-ar-Elái | Michaelston-super-Ely |
| Llanfihangel-y-fedw | Michaelston-y-fedw |
| Llanfihangel-y-pwll | Michaelston-le-Pit |
| Llanfleiddan | Llanblethian |
| Llanfocha | Saint Maughans |
| Llangamarch | Llangamarch Wells |
| Llanganna | Llangan |
| Llangatwg | Llangattock |
| Llangatwg Dyffryn Wysg | Llangattock nigh Usk |
| Llangeinwyr | Llangeinor |
| Llangrallo | Coychurch |
| Llangynydd | Llangennith |
| Llangystennin Garth Brenni | Welsh Bicknor |
| Llanhari | Llanharry |
| Llanhiledd | Llanhilleth |
| Llanhuadain | Llawhaden |
| Llanilltud Faerdref | Llantwit Fardre |
| Llanilltud Fawr | Llantwit Major |
| Llanilltud Gŵyr | Ilston |
| Llanisan-yn-Rhos | Saint Ishmaels |
| Llanisien | Llanishen |
| Llanllieni | Leominster |
| Llanllŷr | Llanyre |
| Llan-lwy | Llandeloy |
| Llanmartin | Marstow |
| Llanmihangel | Michaelchurch |
| Llannerch Banna | Penley |
| Llannewydd | Newchurch (Carmarthenshire) |
| Llannewydd | Newchurch (Powys) |
| Llanofer Uchaf | Upper Llanofer |
| Llanrhymni | Llanrumney |
| Llansanffraid | Bridstow |
| Llansanffraid Gwynllŵg | Saint Brides Wentloog |
| Llansanffraid-ar-Elái | Saint Brides-super-Ely |
| Llansangwenardd | Saint Weonards |
| Llansansiôr | Saint George |
| Llansanwyr | Llansannor |
| Llansawel | Briton Ferry |
| Llansulac | Sellack |
| Llantiuoi | Foy |
| Llanwarw | Wonastow |
| Llanwrtyd | Llanwrtyd Wells |
| Llanwynell | Wolvesnewton |
| Llanwytherin | Llanvetherine |
| Llanymddyfri | Llandovery |
| Llan-y-tair-mair | Knelston |
| Llidiard | Litchard |
| Lloegr | England |
| Llongborth | Portsmouth |
| Llundain | London |
| Llwydlo | Ludlow |
| Llwyncelyn | Hollybush |
| Llwyneliddon | Saint Lythans |
| Llwynhelyg | Withybush |
| Llwyni | Lloyney |
| Llyn Llumonwy | Loch Lomond |
| Llyncwlen | Lincoln |
| Llynpenmaen | Penmaen-pwl |
| Llys-faen | Lisvane |
| Llyswyrny | Llysworney |
| Llyswyry | Lliswerry |
| Lwcsembwrg | Luxembourg |
| Machen Isaf | Lower Machen |
| Maenorbŷr | Manorbier |
| Maerun | Marshfield |
| Maes-glas | Greenfield |
| Maes-y-coed | Woodfieldside |
| Maesycwmwr | Maesycwmer |
| Maesyfed | New Radnor |
| Maesyffynnon | Springfield |
| Magwyr | Magor |
| Manceinion | Manchester |
| Manceinion Fwyaf | Greater Manchester |
| Marcroes | Marcross |
| Mecsico | Mexico |
| Meisgyn | Miskin |
| Melin Ifan Ddu | Blackmill |
| Melin-wynt | Windmill |
| Melltyn | Mellington |
| Merswy | Mersey |
| Merthyr Tudful | Merthyr Tydfil |
| Moldofa | Moldova |
| Môr Udd | English Channel |
| Morfa Baglan | Baglan Moors |
| Morfa Margam | Margam Moors |
| Moryd Gweryd | Firth of Forth |
| Mwynglawdd | Minera |
| Mynachlog Nedd | Neath Abbey |
| Mynwar | Mynwear |
| Mynwent y Crynwyr | Quakers Yard |
| Mynyddcynffig | Kenfig Hill |
| Mynydd-y-Fflint | Flint Mountain |
| Nanhyfer | Nevern |
| Niwbwrch | Newborough |
| Niwgwl | Newgale |
| Norwy | Norway |
| Notais | Nottage |
| Ogwr | Ogmore |
| Owrtyn | Overton |
| Pacistan | Pakistan |
| Pantygerdinen | Ashvale |
| Papua Guinea Newydd | Papua New Guinea |
| Parc Cathays | Cathays Park |
| Parc Cwmdoncyn | Cwmdonkin Park |
| Parc Hendredenny | Hendredenny Park |
| Parc Lansbury | Lansbury Park |
| Parc Victoria | Victoria Park |
| Parc Watford | Watford Park |
| Parc y Rhath | Roath Park |
| Parciau | Parkey |
| Patrisio | Partrishow |
| Pedair-hewl | Four Roads |
| Pen Pyrod | Worm's Head |
| Penalun | Penally |
| Penarlâg | Hawarden |
| Penarth Isaf | Lower Penarth |
| Penbedw | Birkenhead |
| Pencraig | Old Radnor |
| Pendeulwyn | Pendoylan |
| Penffordd-las | Staylittle |
| Penfro | Pembroke |
| Pengelli | Grovesend |
| Pen-hw | Pen-how |
| Penlle'r-brain | Ravenhill |
| Pen-marc | Penmark |
| Penrhudd | Penrith |
| Pen-rhys | Penrice |
| Pentre Elan | Elan Village |
| Pentre Helygain | Pentre Halkyn |
| Pentremeurig | Pentre Meyrick |
| Pentre-poeth | Morganstown |
| Pentre'r Eglwys | Church Village |
| Pentre'r-ardd | Garden Village |
| Pentywyn | Pendine |
| Penwynion | Pennines |
| Pen-y-bont ar Ogwr | Bridgend |
| Pen-y-bryn | Hilltop |
| Periw | Peru |
| Pilgwenlli | Pillgwenlly |
| Pont Arberth | Narberth Bridge |
| Pontarfynach | Devil's Bridge |
| Pontfadlen | Merlins Bridge |
| Pont-ffranc | Frank's Bridge |
| Pont-rhyd-y-bont | Four Mile Bridge |
| Pontsenni | Sennybridge |
| Pontybrenin | Kingsbridge |
| Pont-y-pŵl | Pontypool |
| Porth Tywyn | Burry Port |
| Porthaethwy | Menai Bridge |
| Porthceri | Porthkerry |
| Porthceri Isaf | Lower Porthkerry |
| Porthllechog | Bull Bay |
| Porthsgiwed | Portskewett |
| Portiwgal | Portugal |
| Post-mawr | Synod Inn |
| Prysg | Prisk |
| Pump-hewl | Five Roads |
| Pyllau Bedwellte | Bedwellty Pits |
| Radur | Radyr |
| Radur | Rhadyr |
| Ras Isaf | Lower Race |
| Ras Uchaf | Upper Race |
| Rhaeadr Gwy | Rhayader |
| Rhisga | Risca |
| Rhiwabon | Ruabon |
| Rhiwbeina | Rhiwbina |
| Rhiw'r-perrai | Ruperra |
| Rhos Fawr | Great Rhos |
| Rhosan-ar-Wy | Ross-on-Wye |
| Rhos-goch | Red Roses |
| Rhuthun | Ruthin |
| Rhydaman | Ammanford |
| Rhydgaled | Chancery |
| Rhydodyn | Edwinsford |
| Rhydri | Rudry |
| Rhyd-y-blew | Carmeltown |
| Rhydychen | Oxford |
| Rhymni | Rhymney |
| Rwmania | Romania |
| Rwsia | Russia |
| Sain Dunwyd | Saint Donats |
| Sain Ffagan | Saint Fagans |
| Sain Nicolas | Saint Nicholas (Vale of Glamorgan) |
| Sain Silian | Saint Julians |
| Sain Tathan | Saint Athan |
| Saint Andras | Saint Andrews Major |
| Saint Hilari | Saint Hilary |
| Saint-y-brid | Saint Brides Major |
| Saint-y-brid | Saint Brides Netherwent |
| San Steffan | Westminster |
| Sanclêr | Saint Clears |
| Sant Kitts a Nevis | Saint Kitts and Nevis |
| Sao Tome a Principe | Sao Tome and Principe |
| Sarc | Sark |
| Sbaen | Spain |
| Sbyty | Spytty |
| Seland Newydd | New Zealand |
| Sgeti | Sketty |
| Sgeti Isaf | Lower Sketty |
| Sgiwen | Skewen |
| Sgomer | Skomer |
| Sili | Sully |
| Silstwn | Gileston |
| Sirhywi | Sirhowy |
| Slebets | Slebech |
| Slofacia | Slovakia |
| Slofenia | Slovenia |
| Solfach | Solva |
| Solfach Isaf | Lower Solva |
| Solfach Uchaf | Upper Solva |
| Sonlli | Sontley |
| Swydd Amwythig | Shropshire |
| Swydd Efrog | Yorkshire |
| Swydd Gaer | Cheshire |
| Swydd Gaergrawnt | Cambridgeshire |
| Swydd Gaerhirfryn | Lancashire |
| Swydd Gaerloyw | Gloucestershire |
| Swydd Gaerlŷr | Leicestershire |
| Swydd Gaerwrangon | Worcestershire |
| Swydd Henffordd | Herefordshire |
| Swydd Rydychen | Oxfordshire |
| Swydd Warwig | Warwickshire |
| Tafwys | Thames |
| Talwrn Green | Tallarn Green |
| Tal-y-bont | Buttington |
| Tal-y-bont ar Wysg | Talybont-on-Usk |
| Talyllychau | Talley |
| Tiriogaeth Brydeinig Cefnfor India | British Indian Ocean Territory |
| Tiriogaeth Brydeinig yr Antarctig | British Antarctic Territory |
| Tonysguboriau | Talbot Green |
| Traeth Coch | Red Wharf Bay |
| Traeth Treco | Trecco Bay |
| Trannon | Trent |
| Tre Ioan | Johnstown |
| Treamlod | Ambleston |
| Trebedr | Peterborough |
| Trebefered | Boverton |
| Treberfedd | Middletown |
| Trecelyn | Newbridge |
| Tre-ddu | Blacktown |
| Tredegar Newydd | New Tredegar |
| Tredelerch | Rumney |
| Tredemel | Templeton |
| Tredŵr | Waterton |
| Tredynog | Tredunnock |
| Tref Elliot | Elliot's Town |
| Trefaldwyn | Montgomery |
| Trefansel | Manselton |
| Trefddyn | Trefethin |
| Trefdraeth | Newport (Pembrokeshire) |
| Trefechan | Trevaughan |
| Trefelen | Bletherston |
| Trefesgob | Bishop's Castle |
| Trefesgob | Bishton |
| Trefflemin | Flemingston |
| Treffynnon | Cheltenham |
| Treffynnon | Holywell |
| Trefoffeiriaid | Preston |
| Trefonnen | Nash |
| Treforys | Morriston |
| Trefwrdan | Jordanston |
| Trefyclo | Knighton |
| Trefynwy | Monmouth |
| Treganna | Canton |
| Tregatwg | Cadoxton |
| Tregetin | Keeston |
| Tre-goed | Tregoyd |
| Tregolwyn | Colwinston |
| Tre-groes | Whitchurch (Pembrokeshire) |
| Tregŵyr | Gowerton |
| Trehopcyn | Hopkinstown |
| Tre-hyl | Tre-hill |
| Trelái | Ely |
| Trelales | Laleston |
| Treletert | Letterston |
| Trelyn | Fleur-de-lis |
| Tremarchog | Saint Nicholas (Pembrokeshire) |
| Treopert | Granston |
| Tre'r-llai | Leighton |
| Tresalem | Robertstown |
| Tresigin | Sigingstone |
| Tresimwn | Bonvilston |
| Tretomas | Thomastown |
| Tretŵr | Tretower |
| Trewallter | Walterston |
| Trewiliam | Williamstown |
| Trewyddel | Moylgrove |
| Trinidad a Tobago | Trinidad and Tobago |
| Troedrhiw’r-clawdd | Victoria |
| Trwyn Larnog | Lavernock Point |
| Tryleg | Trellech |
| Tsiecia | Czechia |
| Tsieina | China |
| Twrci | Turkey |
| Twyndrysïog | Briery Hill |
| Tyddewi | Saint Davids |
| Tŷ-du | Rogerstone |
| Tyndyrn | Tintern |
| Ty'n-y-coedcae | Waterloo |
| Unol Daleithiau | United States |
| Warwig | Warwick |
| Wcráin | Ukraine |
| Wdig | Goodwick |
| Wlster | Ulster |
| Wrecsam | Wrexham |
| Y Bahamas | The Bahamas |
| Y Barri | Barry |
| Y Batel | Battle |
| Y Bermo | Barmouth |
| Y Bont-faen | Cowbridge |
| Y Bont-faen | Forge |
| Y Bontnewydd-ar-Wy | Newbridge on Wye |
| Y Borth Uchaf | Upper Borth |
| Y Clas | Clase |
| Y Clas-ar-Wy | Glasbury |
| Y Cocyd | Cockett |
| Y Crwys | Three Crosses |
| Y Cwar | The Quar |
| Y Dafarn Newydd | New Inn |
| Y Ddraenen | Thornhill |
| Y Ddraenen-wen | Hawthorn |
| Y Deyrnas Unedig | United Kingdom |
| Y Drenewydd | Bute Town |
| Y Drenewydd | Newtown |
| Y Fali | Valley |
| Y Fan | Van |
| Y Farteg | Varteg |
| Y Felin-wyllt | Wild Mill |
| Y Fenni | Abergavenny |
| Y Ffindir | Finland |
| Y Fflint | Flint |
| Y Gambia | The Gambia |
| Y Garn | Roch |
| Y Gelli Gandryll | Hay-on-Wye |
| Y Graig | The Rock |
| Y Groes | Crossgates |
| Y Grysmwnt | Grosmont |
| Y Maendy | Maindy |
| Y Mot | New Moat |
| Y Mynydd Bychan | Heath |
| Y Pîl | Pyle |
| Y Rhath | Roath |
| Y Rhws | Rhoose |
| Y Rhyl | Rhyl |
| Y Sblot | Splott |
| Y Sgwâr | Square and Compass |
| Y Swistir | Switzerland |
| Y Traeth Ifori | Ivory Coast |
| Y Trallwng | Welshpool |
| Y Transh | Tranch |
| Y Twyn | Dukestown |
| Y Tŷ Ogofog | Nottingham |
| Y Tyllgoed | Fairwater |
| Y Waun | Chirk |
| Y Waun | Gwernaffield |
| Y Wig | Wick |
| Ynys Bŷr | Caldey |
| Ynys Dewi | Ramsey |
| Ynys Enlli | Bardsey |
| Ynys Gwydrin | Glastonbury |
| Ynys Manaw | Isle of Man |
| Ynys Môn | Anglesey |
| Ynys Wair | Lundy |
| Ynys Wyth | Isle of Wight |
| Ynys y Barri | Barry Island |
| Ynys y Garn | Guernsey |
| Ynysgynwraidd | Skenfrith |
| Ynysoedd Cayman | Cayman Islands |
| Ynysoedd Erch | Orkney |
| Ynysoedd Falkland | Falkland Islands |
| Ynysoedd Heledd | Hebrides |
| Ynysoedd Marshall | Marshall Islands |
| Ynysoedd Philippines | Philippines |
| Ynysoedd Pitcairn | Pitcairn Islands |
| Ynysoedd Prydeinig y Wyryf | British Virgin Islands |
| Ynysoedd Sandwich y De | South Sandwich Islands |
| Ynysoedd Solomon | Solomon Islands |
| Ynysoedd Turks a Caicos | Turks and Caicos Islands |
| Ynysoedd y Sianel | Channel Islands |
| Ynysowen | Merthyr Vale |
| Yr Aifft | Egypt |
| Yr Alban | Scotland |
| Yr Almaen | Germany |
| Yr Ariannin | Argentina |
| Yr As Fawr | Monknash |
| Yr Eglwys Lwyd | Ludchurch |
| Yr Eglwys Newydd | Whitchurch (Cardiff) |
| Yr Eglwys Newydd ar y Cefn | Newchurch (Monmouthshire) |
| Yr Eidal | Italy |
| Yr Emiradau Arabaidd Unedig | United Arab Emirates |
| Yr Heledd Ddu | Northwich |
| Yr Heledd Wen | Nantwich |
| Yr Hôb | Hope |
| Yr Iseldiroedd | Netherlands |
| Yr Orsedd | Rossett |
| Yr Wyddfa | Snowdon |
| Yr Wyddgrug | Mold |
| Yr Ynys Hir | Isle of Skye |
| Yr Ystog | Churchstoke |
| Ystagbwll | Stackpole |
| Ystrad Clud | Strathclyde |
| Ystrad Fflur | Strata Florida |
| Ystum Taf | Llandaf North |
| Ystumllwynarth | Oystermouth |
Acknowledgements
- This list is based on data © Welsh Language Commissioner (2018) This list is licenced under the Open Government Licence 3.0 except where otherwise stated. Contains OS data © Crown copyright and database right 2018. This list also includes data from the The NaPTAN (Public Transport) dataset is published under the Open Government Licence> This list may include errors/omissions, please let me know about any problems
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