Christopher what an interesting question.
> I have often wondered about possible Celtic borrowings in the
Baltic, and this one definitely has me wondering:
>
> The 13th century Volynija Chronicle mentions a Lithuanian divinity
named > Diviriks - the name has not been translated in any of the
sources I have > read, and has been labelled "mysterious" (the name
might be a byname of > Perkunas). I know that if the name is broken
down into Divi-riks, the second > part of the name seems to look like a
relative of Gaulish Rix - which > shouldn't naturally exist in
Lithuanian.
>
> The name grabbed my attention because there is a Celtiberian name -
likely a > divine name - Deiuoreiks "God-king" (Deiuo "god" reiks
"king"). Is it > possible that Diviriks is the same name, borrowed by
the Lithuanians - > perhaps through a Germanic source - or can it be
possible that Celts might > have entered the Baltics during their time
of expansion in the Iron Age (I am > thinking also of a classical
author - need to look the name - who claimed > that soma people in the
Baltics spoke the same language as the British - it > is likely just a
false story - but could there be any truth to it at all?).
Interesting thought. I came across, many years ago a book on Myths and
Legends of the Celtic People (really a book of Irish myth and legend).
In it they suggested that Formorians was etymologically related to
Pomorz - the origins of the Pomeranian Coast.
There are also suggestions that the Attacotti in Scotland spoke a
non-Celtic language.
Bits of stray evidence that may mean northing at all.
Regards
John