Celtic and Greek Conlangs

Anyone have a general celtic and general greek conlang?

Mostly looking for names and names. Working on a gaming world that is
bronze/iron age, but they are the decendents of back to the past types..
Luddites basically, who went to an alien world and found themselves
living the dream, some 500 years later, they are becomming civilized
again..

Celtic form is tribal, much like the 4th cent old Irish. The Greek is
more merchantile, but same basic idea of tech level, but they are more
like 500bc Greek (Attican/Mycean greek in attitude), but it is the
result of some 20 generations of modern people (c.2100) and what they
thought Celtic and Greek was like.

Basically what mostly English speakers, who became fluent in a general
celtic and general greak forms of language.

Mike