Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
αρχιφύλουσ tribal chiefs LXX.Josh.21.1
αρχίφυλοι your tribal chiefs LXX.Deut.29.10

Liddell-Scott-Jones

ἀρχίφυλος (archiphulos) chief of a tribe G:N-M

ἀρχίφυλος-φῡλος, ,

chief of a tribe, [LXX]

LSJ Scripture Refs: LXX.Deut.29.10