The Peoples a Player can choose for a character are as follows:
Byzantine
Greek
Macedonian
Ilyrian
Armenian
Latin
Nomad
Hun
Thracian
Avar
Arab
Sassanid (Persia)
Acheamenid
Assyrian
Kurd
Barbarian
Isaurian
Goth
Slav
Iberian
Numidian
Celt
Outside Kingdoms
Egyptian
Ethiopian
Franks
Artorians (British Celts)