I wish I could help more. Another idea I had was to look at Irish saints because their names are commonly translated but the only one I could find was
Bridget (
Bríd) who apparently in Wales has two names and "
Brîd is more common in the south and
Ffraid in the north" but it's a very common name and strongly associated with the saint. I'm afraid that's as far as my research will get me without speaking Welsh. I hope you find the right name soon.