Phrygian helmets I thought were quite common? Maybe

6 x Akontistai
3 x Uazali
3 x Rorarii
4 x Pantodapoi
2 x Thraikoi Doryphoroi
1 x Pezoi Brettioi
1 x Hippakontistai

Ethnicity doesn't count that much here imo. What counts is fighting style and equipment. They didn't want to return, they wanted to be the masters themselves.