πρόπαππος
From LSJ
οὗτος ὁ υἱός μου νεκρὸς ἦν καὶ ἀνέζησεν, ἦν ἀπολωλὼς καὶ εὑρέθη → This son of mine was dead and has come back to life. He was lost and he's been found.
English (LSJ)
ὁ,
A great-grandfather, And.2.26 codd., Lys.14.39, Pl. Ti.20e. 2 grandfather, M.Ant.1.4.