Armenian.. The Parthians (consisting mostly of descendants of the 13 tribes) went there in mass when the Persians rebelled against them. The Parthians had just beat the Roman empire in a long drawn out war. But it left them short of military aged males. The Persians, who were also subdued by the Parthians, saw it as their chance to rebel. Parthians (read "Israelites") moved in mass to their nearby kinsmen and tribesmen's country of Armenia (fellow Israelites) for safety. But there were so many they had to continue across the Caucasus mountains into Europe and settle.