I could be of Celtic orgin

[Maeran]

If we're going to be like that, I would put money on most of Europe and North America's population having a bit of every ethnic group that was in the region or traded with it. Because people are like that.

Still, you could look at it a different way and celebrate the newly named Collossos discovering his potential Celtic past.

Welcome to the party!

Maeran- Probably mainly of Ordovician and Brigante stock. With healthy doses of Roman, Danish, Saxon and Norman French and a little bit of other things for flavour.