I'm english (but have lived in Wales most of my life) and DH is welsh.
We do not have any preference for awelsh or english name. My welsh DH has the english name Robert.
However, DH says that he would have to pronounce the name Dullan, which is the welsh pronouciation. I only like the English pronounciation Dillan.
DH does not like the idea of using an English pronounciation for a Welsh name.
If you are welsh and have any friends called Dylan, which pronounciation do you use?