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The original list was of Welsh place names with their English equivalents (not direct translations necessarily) - and some obscure names
This had been revised and updated by Richard Morgan in 2004; it has no sources shown [but probably some at least based on [PRW]]
That original list has now been extended to include other place names which have changed in some way over time, these later additions are indicated by an * and are simply shown as alternatives without reference to which version is current - use your browser's Find facility to search both columns.
Some of the entries from C19th Topographical Dictionaries may look a bit 'Anglicised 'but are included either because they suggest the original origin or may be the name version being looked for.
The list doesn't include minor spelling variations, a single L for LL or those caused by use of the English K for C. or V for F.
Sources/Further References to place names
| Welsh or Alternative 1* |
English or Alternative 2* |
Parish | Source/Comments |
| Aberafan | Aberavon | Aberavon | |
| Aberbargod | Aberbargoed | Gelligaer | |
|
Aberconvoye * |
Abercwmboi * |
Aberdare | [DJ] |
| Abercynffig | Aberkenfig | Newcastle | |
| Aberdâr | Aberdare | Aberdare | |
|
Aberdare Junction * |
Abercynon * |
Llanwonno | [DJ] |
| Aberddawan | Aberthaw | Penmark | |
| Abergwynfi | Afan Vale | ||
| Aberogwr | Ogmore-by-Sea | St. Brides Major | |
| Aberpennar | Mountain Ash | Llanwonno | |
| Abertawe | Swansea | Swansea | |
|
Allen's Town * |
Caegarw * |
Llanwonno | [DJ] |
| As Fach, Yr | Nash | Llysworney | |
| As Fawr, Yr | Monknash | Monknash | |
| Bargod | Bargoed | Gelligaer | |
| Barri, Y | Barry | Barry | |
|
Basin * |
Abercynon * |
Llanwonno | [DJ] |
| Betws Tir Iarll * | Betws * | Bettws | [PRW] |
| Bewpyr * | Bewper / Beaupré | St Hilary | [Davies] |
| Blaendulais * | Seven Sisters * | Cadoxton juxta Neath | [Davies] |
| Bont-faen, Y | Cowbridge | Cowbridge | |
| Boulston / Bolston * | Bonvilston * | Bonvilston |
[PRW] & [Lewis] - See also Tresimwn |
| Britwn, Y * | Burton * | Penmark | [Davies] |
| Brychdwn * | Broughton * | Wick | [Davies] |
| Bryn Owen * | Stalling Down * | Llanblethian | [Davies] |
| Caer Tawy * | Oystermouth * | Oystermouth | [Lewis] |
| Caerau a Threlái * | Caerau with Ely * | Caerau | [PRW] |
| Caerdydd | Cardiff | Cardiff | |
| Caerffili | Caerphilly | Eglwysilan | |
| Casllwchwr | Loughor | Loughor | |
| Castell-nedd | Neath | Neath | |
| Castellnewydd, Y | Newcastle | Newcastle | |
| Chapel Ilterne * | Llanilltern * | Llanilltern | [Lewis] |
| Cilâ * | Killay * | Swansea | [PRW] |
| Cilfái | Kilvey | Llansamlet | |
| Clun, Y /Clyne * | Llwynderw * | Oystermouth | [PRW] |
| Cocyd, Y | Cockett | Swansea | |
| Coed Du Church * |
Llangrallo * Coychurch * |
Coychurch | [Carlisle] |
|
Coedfrank / Coedffranc * |
Skewen * | Cadoxton-juxta-Neath | [Glamorgan list] |
| Coety | Coity | Coity | |
| Cornel-y-parc * | Croes-y-parc * | St Nicholas | [Davies] |
| Creunant, Y | Crynant | Cadoxton-juxta-Neath | |
| Crwys, Y * | Three Crosses * | Llanrhidian | [Davies] |
| Cwm Afan * | Afan Vale * | [PRW] | |
| Cwmafan | Cwmavon | Michaelston super Avon | |
| Cynffig | Kenfig | Pyle & Kenfig | |
| Ddraenen Wen * | Hawthorn * (Pontypridd) |
Llantwit Fardre | [Davies] |
| Drenewydd yn Notais | Newton Nottage | Newton Nottage | |
| Dwn-rhefn * | Dunraven * | St Brides Major | [Davies] |
| Eglwys Fair * | St Mary Church * | St Mary Church | [Carlisle]/[Lewis] |
| Eglwys Fair y Mynydd | St. Mary Hill | St Mary Hill | |
| Eglwys Newydd, Yr | Whitchurch | Whitchurch | |
| Ewenni | Ewenny | Ewenny | |
| Ffont-y-gari | Fontygary | Penmark | |
| Ffwl-y-mwn | Fonmon | Penmark | |
| Ffynnon Taf | Taffs Well | Eglwysilan | See also Trelywy |
| Filltir Aur * | Golden Mile * | Colwinston | [Davies] |
| Flimston * | Flemingston * | Flemingston | [PRW] & [Lewis] - see also Trefflemin |
| Gilfach * | Gilfach Fargod * | Gelligaer | [Davies] |
| Glan-bad * | Upper Boat * | Eglwysilan | [Davies] |
|
Glanbradach * |
Llanbradach * |
Eglwysilan | [DJ] |
| Glandwr | Landore | Llangyfelach | |
|
Glanmarlais * |
Llanmorlais * [Penclawdd] |
Llanrhidian | [DJ] |
| Glyn-nedd | Glyn Neath | Cadoxton-juxta-Neath | |
| Glynrhedynog | Ferndale | Ystradyfodwg | |
|
Gower Road * |
Gowerton * | Loughor | [DJ] |
| Great Nash * | Monknash * | Monknash | [Carlisle] |
| Gwenfô Gwynva * |
Wenvoe | Wenvoe | [Lewis] |
| Gwter Fawr | Brynaman (Upper/Lower) | Llangiwg | See also under CMN |
| Hengastell, Yr * | Oldcastle * (Bridgend) |
Coity | [Davies] |
|
Heol y Felin * |
Trecynon * | Aberdare | [DJ] |
| Larnog | Lavernock | Lavernock | +[Lewis] |
| Lecwydd | Leckwith | Leckwith | |
| Llan-Arau * | Llanharry * | Llanharry | [Lewis] |
| Llan-faes | Llanmaes | Llanmaes | |
| Llan-Ganna * | Llangan * | Llangan | [Lewis] |
| Llan-Geinwyr * | Llangeinor * | Llangeinor | [Lewis] |
| Llan-Genydd * | Llangennith * | Llangennith | [Lewis] |
| Llan-giwg | Llanguick(e) | Llangiwg | +[Lewis] |
| Llan-Illtyd-faer-dre * | Llantwit Fardre * | Llantwit Fardre | [Lewis] |
| Llan-San-Nwr * | Llansannor * | Llansannor | [Lewis] |
| Llan-tri-saint * Llantrissent * |
Llantrisant * | Llantrisant | [Lewis] |
| Llan-y-tair-mair | Knelston | Knelston | |
| Llanbedr-ar-fynydd | Peterston-super-montem | Peterston Super Montem | +[Carlisle]/[Lewis] |
| Llanbedr-y-Fro | Peterston-super-Ely | Peterston Super Ely | |
| Llanbydderi | Llanbethery | Llancarfan | |
| Llancatal | Llancadle | Llancarfan | |
| Llanddunwyd | Welsh St. Donats | Welsh St. Donats | |
| Llandeilo Ferwallt | Bishopston | Bishopston | +[Lewis] |
| Llandochau Fach | Llandough-juxta-Penarth | Llandough-juxta-Penarth | +[Lewis] |
| Llandochau, Llandochau'r Bont-faen |
Llandough-juxta-Cowbridge | Llandough-juxta-Cowbridge | +[Lewis] |
| Llandw / Llan-Dwy * Llan-Dwfr * |
Llandow | Llandow | +[Lewis]/[Carlisle] |
| Llandudwg | Tythegston | Tythegston | |
| Llanffa * | Lampha * | Ewenny | [Davies] |
| Llanfair / Llan-Fair | St. Mary Church | St. Mary Church | |
| Llanfihangel-ar-Elái | Michaelston-super-Ely | Michaelston-super-Ely | |
| Llanfihangel-y-Bont-faen | Llanmihangel | Llanmihangel | +[Lewis] |
| Llanfihangel-y-pwll | Michaelston-le-Pit | Michaelston-le-Pit | |
| Llanfiangel -yn-y-gwaelod * | Michaelston-le-Pit * | Michaelston-le-Pit | [Carlisle] |
| Llanfihangel-ynys-Afan | Michaelston-super-Avon | Michaelston-super-Avon | |
| Llanfleiddan | Llanbleddian / Llanblethian | Llanbleddian | |
| Llanfrynach * | Penllyn * | Penllyn | [PRW] |
| Llangatwg Nedd, Llangatwg Glyn Nedd |
Cadoxton (juxta Neath) | Cadoxton-juxta-Neath | |
| Llangonoyd * / Llangonwd * | Llangynwyd * | Llangynwyd | [Lewis] |
| Llangrallo | Coychurch | Coychurch | +[Lewis] |
| Llangynydd | Llangennith | Llangennith | |
| Llanhari | Llanharry | Llanharry | |
| Llanilltud Faerdref | Llantwit Fardre | Llantwit Fardre | |
| Llanilltud Fawr | Llantwit Major | Llantwit Major | |
| Llanilltud Gwyr | Ilston | Ilston | |
| Llanilltud Nedd | Llantwit-juxta-Neath | Llantwit-juxta-Neath | |
| Llansanffraid-ar-Elái | St. Brides-super-Ely | St. Brides-super-Ely | |
| Llansanffraid-ar-Ogwr | St. Brides Minor | St. Brides Minor | |
| Llansawel / Llansawyl | Briton Ferry | Briton Ferry | + [Lewis] |
| Llanwynno | Llanwonno | Llanwonno | |
| Llanyrnewydd | Penclawdd | Llanrhidian | |
| Llechwedd * / Llech-Wydd * | Leckwith * | Leckwith | [Lewis] |
| Llwyneliddon | St. Lythans | St. Lythans | |
|
Llwyni, Y * |
Maesteg * | Llangynwyd | [DJ] |
| Llys-faen | Lisvane | Lisvane | |
| Llyswyrny | Llysworney | Llysworney | |
| Marcroes | Marcross | Marcross | |
| Mary-cross * | Marcross * | Marcross | [Lewis] |
| Meisgyn | Miskin | Llantrisant | |
| Melin Ifan Ddu | Blackmill | Llandyfodwg | |
|
Merthyr Myfor * |
Merthyr Mawr * | Merthyr Mawr | [DJ] |
| Merthyr Tudful | Merthyr Tydfil | Merthyr Tydfil | |
| Mwmbwls | Mumbles | Oystermouth | |
| Mynachlog Nedd | Neath Abbey | Cadoxton-juxta-Neath | |
| Mynwent y Crynwyr | Quakers Yard | Llanfabon | |
| Mynyddcynffig | Kenfig Hill | Tythegston | |
|
Navigation * |
Abercynon * | Llanwonno | [DJ] |
| Newbridge * | Pontypridd * | Llantwit Fardre | [DJ] |
| Pant-yr-ych * | Pentyrch * | Pentyrch | [Carlisle] |
| Pen Pyrod * | Worms Head * | Rhossili | [Davies] |
| Pen-arth * | Pennard * | Pennard | [Lewis] |
| Pen-dar * | Margam * | Margam | [Lewis] |
| Pen-Clawdd * | Llanyrnewydd * | Llanrhidian | [PRW] |
| Pen-marc | Penmark | Penmark | |
| Pen-y-bont ar Ogwr * | Bridgend * | Coity | [Owen] |
| Pendeulwyn | Pendoylan | Pendoylan | +[Lewis] |
| Pengelli-ddrain * | Grovesend * | Llandeilo Tal-y-bont | [Davies] |
| Pentrepoeth * | Treforgan * Morganstown * |
Radyr | [Davies] |
| Pîl a Chynffig | Pyle & Kenfig | Pyle And Kenfig | |
|
Pont y Clown * |
Pont y Clun * | Llantrisant | [DJ] |
| Pontneddfechan | Pontneathvaughan | Cadoxton-juxta-Neath | |
| Porth-Einion * | Port Eynon * | Port Eynon | [Lewis] |
| Porthceri | Porthkerry | Porthkerry | |
| Radur | Radyr | Radyr | |
| Rhaiadr / Rhaiadar * | Radyr * | Radyr | [Lewis]/[Carlisle] |
| Rhath, Y | Roath | Roath | +[Lewis] |
| Rhos-Sulwy * | Rhossili * | Rhossili | [Lewis] |
| Rhudd-dre * | Rudry * | Rudry | [Carlisle] |
| Rhws, Y * | Rhoose * | Penmark | [Davies] |
| Rhydfelen * | Rhyd-y-felin * | Eglwysilan | [Davies] |
| Rhydri | Rudry | Rudry | |
| Rhymni | Rhymney | Gelligaer | |
|
Rotheney * |
Rhondda * | Various | [DJ] |
| Sain Dunwyd | St. Donat's | St. Donats | |
| Sain Ffagan | St. Fagans | St. Fagans | |
| Sain Nicolas | St. Nicholas | Llanmaes | |
| Sain Siorys | St. George-super-Ely | St. George Super Ely | |
| Sain Tathan | St. Athan | St. Athan | |
| Saint Andras | St. Andrews Major | St. Andrews Major | |
| Saint Hilari | St. Hilary | St. Hilary | |
| Saint-y-brid | St. Brides Major | St. Brides Major | |
| Sblot, Y | Splott | Roath | |
| Sgeti | Sketty | Swansea | |
| Sgiwen | Skewen | Cadoxton-juxta-Neath | |
| Sili | Sully | Sully | |
| Silstwn | Gileston | Gileston | |
| Tal-y-garn | Talygarn | Talygarn | |
| Thaw * | Llansannor * | Llansannor | [Lewis] |
| Tre-gwyr | Gowerton | Loughor | |
| Trebannws | Trebanos | Llangyfelach | |
| Trebefered | Boverton | Llantwit Major | |
| Trefflemin | Flemingston | Flemingston | |
| Treforys | Morriston | Llangyfelach | |
| Treganna or Cantwn | Canton | Canton | |
|
Tregantllo * Tregawntlo * |
Candleston * | Merthyr Mawr | [Davies] |
|
Tregatwg |
Cadoxton (juxta Barry) |
Cadoxton-juxta-Barry | |
| Treglement * | Clemenston * | St Andrews Minor | [Davies] |
| Tregolwyn | Colwinston | Colwinston | |
| Trehopcyn * | Hopkinstown * | Llanwonno | [Davies] |
| Trelái | Ely | Llandaff | |
| Trelales | Laleston | Laleston | |
| Trelywy * | Ffynnon Taf * | Eglwysilan | [PRW] |
| Treorci | Treorchy | Ystradyfodwg | |
| Tresalem | Robertstown | Aberdare | |
| Tresigin | Siginstone | Llantwit Major | |
| Tresimwn | Bonvilston | Bonvilston | |
| Trewallter | Walterston | Llancarfan | |
| Trewiliam | Williamstown | Llantrisant | |
| Trwyn Larnog * | Lavernock Point * | Lavernock | [Davies] |
| Tyllgoed | Fairwater | Llandaff | |
| Wenni, Y * | Ewenny * | Ewenny | [Lewis] |
| Wig, Y | Wick | Wick | |
| Ynysowen * | Merthyr Vale * | Merthyr Tydfil | [Davies] |
| Ynys y Barri * | Barry Island * | Barry | [Davies] |
| Yr-yw-dre * | Rudry * | Rudry | [Lewis] |
| Ystradyfodwg * | Ystrad Rhondda * | Ystradyfodwg | [Davies] |
| Ystumllwynarth | Oystermouth | Oystermouth |
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