which counties have American names
Names aren't 'translated' into Welsh, some names have a Welsh equivalent but many don't.
The majority of Welsh speakers are in Gwynedd, North Wales (62.5%+ fluent), especially in the Caernarfon area where roughly 90% are Welsh-speaking.The divide is more obvious from East - West Wales, in the western counties are in the 40%+ area of Welsh speakers, the eastern counties are usually under 40% Welsh speakers.
Clare and Kerry are two Irish counties that are used as names for girls.
All Welsh-speaking people in Wales are bilingual in English so there's no need to devise a special spelling for English names.
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Wales and some communities in the Patagonia region of Argentina.
There are 2 counties - Oneida & Owyhee.
Names are not translated; but the Welsh version of Steven is Steffan.
It is a common misconception that names change in Welsh, there are a few name which change, but only first names. Last names remain the same.
Shropshire is the Welsh county adjacent to the Welsh border. It is located in England and borders Wales to the east.
Not all names used in the English-speaking world have Welsh forms. 'Clint' sounds more American than Welsh and Hacken is an English surname from Derbyshire and Nottingham.