I could be of Celtic orgin

[overweightninja]

It would be good to be a decendent of a powerful warlord.

Aren't something like 10-25% of all men descended from Genghis Khan? Swear I read that somewhere....
Anyway I think if you dig back far enough, the amount of migrations and stuff that have gone on over the centuries means most people could probably claim descendancy from most of the major groups going around.
I'm from one of those Dark Green regions (well, the other side of the river), but I'm pretty sure there's a hell of a lot more Roman, Turkish, Russian, Norman etc etc etc blood in me than celtic :p
Cheers