From Walnuttree Green, Hertfordshire to all cities in Dyfed starting with letter A
- Aber, Hertfordshire
- Aber Arad, Hertfordshire
- Aber banc, Hertfordshire
- Aber Giâr, Hertfordshire
- Aberaeron, Hertfordshire
- Aberarth, Hertfordshire
- Abercastle, Hertfordshire
- Abercych, Hertfordshire
- Abereiddy, Hertfordshire
- Aberffrwd, Hertfordshire
- Abergorlech, Hertfordshire
- Abergwili, Hertfordshire
- Aberlerry, Hertfordshire
- Abermagwr, Hertfordshire
- Abermeurig, Hertfordshire
- Abernant, Hertfordshire
- Aberporth, Hertfordshire
- Aberystwyth, Hertfordshire
- Achddu, Hertfordshire
- Adpar, Hertfordshire
- Albert Town, Hertfordshire
- Albro Castle, Hertfordshire
- Allt, Hertfordshire
- Alltwalis, Hertfordshire
- Alltyblaca, Hertfordshire
- Ambleston, Hertfordshire
- Ammanford, Hertfordshire
- Amroth, Hertfordshire
- Angle, Hertfordshire
- Ashfield, Hertfordshire