Looks like a few states have them. Pennsylvania seems to have the most due to Welsh Quakers.
Pennsylvania:
Bala Cynwyd
Bangor - the first Chief Burgess an emigrant from Wales.
Berwyn
Bryn Mawr - founded by Welsh Quakers.[3]
Caernarvon Township
Upper Gwynedd and Lower Gwynedd Townships.
Haverford
Montgomery County
Narberth
Nanty Glo - from the Welsh nant y glo, stream of coal.[4]
North Wales
Radnor Township
Tredyffrin Township [4]
It takes most people ages to realise thatā¦ 
OK got it, pleased to āmeetā you
SUSAN
I tried to change my user nameā¦ letās see if it worked
The most Welsh place names, I would imagine would be in the areas of the old Welsh Tract?
That does seem to be the case.
Seems not - but Iāll be able to overwrite it for you - what would you like me to set it to be? [Bear in mind youāll need to log in with the new name once Iāve changed it!].
Ok Diolch!
"SusanDaviesā os gwelwych yn dda
Andā¦ done!