Usage: 3 forms in 3 verses
Form Translated As     In Verse(s)
απόγονοσ a descendant LXX.1Chr.20.6
απόγονοι descendants LXX.2Sam.21.22
απογόνων descendants LXX.2Sam.21.18

Liddell-Scott-Jones

ἀπόγονος (apogonos) a descendant G:A

ἀπόγονος, ον,

born or descended from, Τλαύκου οὔτε τι . ἐστι has no descendant, [Refs 5th c.BC+]: in plural, descendants, [Refs 5th c.BC+]; σαὶ.. ἀπόγονοι thy offspring, [Refs 5th c.BC+]

__II viable, [Refs 5th c.BC+]