What time period are we talking about?
Re your band of Welsh being Huguenots - If they were Huguenots, they would have said so. If they were Welsh, it would have said "Welsh." I've never heard that name you are researching as being in born in Wales. Welsh did emigrate to Dublin County in about 1782. Where they came from in Wales, I have no idea. Not even sure they didn't come from somewhere else in the USA first.
Can't really help you unless you give me a date.