Ilan's not very common, but I think it might be getting more use lately, I've seen a few in
BAs. He was an early Welsh saint; nobody seems to know much about him.
Deio (day-o) is a short form of
Dafydd or
David, and Ynyr is another very old name, borne by 5th-century kings and such. It's pronounced, roughly, UN eer. The theory is that it's an early Welsh version of the
Roman name
Honorius.
(& thanks for the reply! I always wonder if anyone reads these posts.)