G3966–πατριάρχης–patriarchēs

`Men, brethren! it is permitted to speak with freedom unto you concerning the patriarch David, that he both died and was buried, and his tomb is among us unto this day;

πατριάρχου patriarchou “patriarch”

`And He gave to him a covenant of circumcision, and so he begat Isaac, and did circumcise him on the eighth day, and Isaac `begat' Jacob, and Jacob -- the twelve patriarchs;

πατριάρχας. patriarchas “patriarchs.”

and the patriarchs, having been moved with jealousy, sold Joseph to Egypt, and God was with him,

πατριάρχαι patriarchai “patriarchs”

And see how great this one `is', to whom also a tenth Abraham the patriarch did give out of the best of the spoils,

πατριάρχης. patriarchēs “patriarch.”