πατρώνυμον

From LSJ

πρέπει γὰρ τοὺς παῖδας ὥσπερ τῆς οὐσίας οὕτω καὶ τῆς φιλίας τῆς πατρικῆς κληρονομεῖν → it is right that children inherit their fathers' friendships just as they would their possessions

Source

Mantoulidis Etymological

Ἀπό τό πατήρ + ὄνομα, ὅπου δές γιά περισσότερα παράγωγα, καθώς καί στή λέξη πατρίς.