Liddell-Scott-Jones

πρωτόγονος (prōtogonos) first-ripe ^G:A

πρωτόγονος-γονος, ον,

also η, ον [Refs 2nd c.AD+]:— first-born, firstling, ἄρνες, ἔριφοι, [Refs 8th c.BC+]; φοῖνιξ π. first-born, first-created, [Refs 5th c.BC+]; τὰ π. [LXX]; of the tissues,= ὁμοιομερῆ, [Refs 5th c.BC+]; of a child, π. θάλος [Refs 5th c.BC+]; π. λόγος, υἱός, [Refs 1st c.AD+]; of the τριάς (= [Refs 4th c.AD+]

__2 of rank, π. οἶκοι high-born houses (εὐγενεῖς, [Refs 5th c.BC+]
__3 epithet of gods, [Refs 5th c.AD+]; so Πρωτογόνη, ἡ, name of Persephone, [Refs 2nd c.AD+]
__II paroxytone πρωτογόνος, ἡ, bringing forth first, implied by [Refs 2nd c.AD+]

_{LSJ Scripture Refs: LXX.Mic.7.1}