My grandfather (born end of the 1800s) was from Cornwall and was a Cornish speaker
Loveday,
Jago and
Jory are three of my very favourite names. I find quite a lot of Cornish female names a bit overblown, but I do like
Tamsin. I think
Demelza was made up quite recently?
I also like
Pasco and Petroc a lot
http://www.behindthename.com/pnl/167578