Well since there's a bunch of families inside the kingdom on the continent of Oneria, they would be able to play characters from all over the world really. 

The House Vallion live on the islands. The Lothian in the North. Harrington in the mountains. Martel, Helios, Praetor in the desert. Braxton in the riverlands. Lancaster in the plains. And the royal family of course, the Valyrian. 

They could play as peasents, knights and servants as well. And there's even a few organizations throughout the kingdom. 

Should I post a list?[@Primal Conundrum]