I wouldn't worry at all about not being Welsh, if that's holding you back. our daughter's name is either Danish/Icelandic or Irish (depending on which etymology you prefer) and we're
Dutch with my husband being a quarter
German. It's absolutely no issue at all. If you'd plan to use a very ethnic sounding Japanese name or something, then yes, I might advise to think twice, but
Bronwen is straightforward enough to be used by non-Welsh people.