According to Beekes, probably of Pre-Greek origin. It can hardly be from γίγνομαι (gígnomai).
γίννος • (gínnos) m (genitive γίννου); second declension
| Case / # | Singular | Dual | Plural | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominative | ὁ γῐ́ννος ho gínnos |
τὼ γῐ́ννω tṑ gínnō |
οἱ γῐ́ννοι hoi gínnoi | ||||||||||
| Genitive | τοῦ γῐ́ννου toû gínnou |
τοῖν γῐ́ννοιν toîn gínnoin |
τῶν γῐ́ννων tôn gínnōn | ||||||||||
| Dative | τῷ γῐ́ννῳ tôi gínnōi |
τοῖν γῐ́ννοιν toîn gínnoin |
τοῖς γῐ́ννοις toîs gínnois | ||||||||||
| Accusative | τὸν γῐ́ννον tòn gínnon |
τὼ γῐ́ννω tṑ gínnō |
τοὺς γῐ́ννους toùs gínnous | ||||||||||
| Vocative | γῐ́ννε gínne |
γῐ́ννω gínnō |
γῐ́ννοι gínnoi | ||||||||||
| Notes: |
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