In the Dave Arneson's Blackmoor Campaign Sourcebook, the entry on the Barbarian class suggests, reasonably enough, that the majority of Barbarians in Blackmoor are of Skandaharian origin. Westryn Elves and Half-Orcs have the Barbarian as their favored class. Docrae and Dwarves also seem suitable for this class.

I was more surprised to see Thonian Barbarian NPCs featured in two MMRPG episodes, Episode 24 and Episode 29. Granted, both episodes are set in fairly remote areas. Although I usually see Thonians as representatives of civilization, I suppose some families living in the outskirts or backwater parts of the North could have descended into Barbarism? Or you could have individuals who are raised by other Barbarian cultures of course. Could there even be High Thonians who have "gone native", Victorian Age style?

Would you allow Barbarians from all races in your campaigns?

-Havard