Question #40860. Asked by mochyn.
Last updated Aug 23 2016.
Linus_337
Answer has 5 votes
Currently Best Answer
Linus_337 22 year member
503 replies
Answer has 5 votes.
Currently voted the best answer.
Well, as Casey Casem would say, it's a tie:
Box, in Carmarthenshire.
Cil, in Montgomeryshire.
Cog, in Glamorgan.
Cwm, virtually everywhere.
Ely, in Glamorgan.
Ham, in Glamorgan.
Hem, in Montgomeryshire.
Lon, in Merioneth.
Pit, in Monmouthshire.
Ton, in Monmouthshire.
Twr, in Anglesey.
Usk, in Monmouthshire.
Van, in Montgomeryshire.
Van, in Glamorgan.
Wig, in Montgomeryshire.
https://en.wikipedia.org/wiki/Welsh_toponymy