identity

The story

1. Ancient Greek · derived fromταὐτότης“sameness”
2. Late Latin · derived fromidemptitās, identitās
3. Middle French · derived fromidentité
4. Middle English · inherited fromydemptite
5. English todayidentity

From Middle English ydemptite, from Middle French identité and its etymon Late Latin idemptitās, identitās, from idem (“the same”) + -tās (suffix forming abstract nouns) as a calque of Ancient Greek ταὐτότης (tautótēs, “sameness”).