You searched for: “filionym”
filionym (s) (noun), filionyms (pl)
A name derived from that of a son: "Bobby was the filonym for Bob, Jr. who was son of a father who was also named Bob."
This entry is located in the following units: fili- (page 1) -onym, -onymy, -onymic, -onymically, -onymous, -onymously, -nym (page 5)