Mmm, interesting. Though the modern Celtic languages are reasonably both worn down and changed compared to two thousand years ago^*, that might or might not be indicative of anything.

How's your Old Celtic? ;^b

* Okay, I don't know much about the Celtic languages; but going on the likes of the Old Celtic name Caratacos becoming "Caradog" in modern Welsh, or "Prydain" and "Cruithne" sharing the same source (the latter, of course, in Q-Celtic), etc...