What Nationalities Can Rook Have Based on Their Faction?

I’m planning my next Rook and wanted to know what are the possible nationalities depending on Rook Faction. These seem pretty set in stone:

• ​Mourn Watch: Nevarran.

• ​Antivan Crows: Antivan.

• ​Shadow Dragons: Tevinter.

​But the other factions can accept people from anywhere. I was wondering if the game confirms or heavily implies a specific nationality for those remaining factions (GW, VJ and LoF). Does anyone know if there’s a canon nationality for them?