Where does “εαυτός” come from?

εαυτός (Greek) comes from Byzantine Greek ἑαυτός, from Ancient Greek ἑαυτοῦ, from Ancient Greek αὐτοῦ — here, there; masculine/neuter genitive singular...

εαυτός (Greek): myself, yourself, himself, herself, itself,...

Definitions

myself, yourself, himself, herself, itself,...

Ancestry of “εαυτός”, step by step

Step	Language	Word	Meaning
1	Byzantine Greek	ἑαυτός	—
2	Ancient Greek	ἑαυτοῦ	himself, herself, itself, themselves; used for...
3	Ancient Greek	αὐτοῦ	here, there; masculine/neuter genitive singular...

Every word from Ancient Greek αὐτοῦ →Every word from Ancient Greek ἑαυτοῦ →Every word from Byzantine Greek ἑαυτός →