Abbott-Smith Manual Greek Lexicon
ἀμήτωρ (G282)
1 * ἀμήτωρ , -ορος, ὁ, ἡ ( μήτηρ ), without a mother (freq. in Gk. writers of the gods): ἀπάτωρ ἀ. of one without recorded genealogy, He 7:3 (cf. MM, VGT , s.v.).
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain