αὑτοῦhautoû

= ἑαυτοῦ (see that word), Matthew 6:34, Luke 12:17, and elsewhere.

Greek (New Testament) · G848

Same root

ἑαυτοῦheautoû · G1438him- (her-, it-, them-, also (in conjunction with the personal pronoun of the other persons) my-, thy-, our-, your-) self (selves), etc.

Source: G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), public domain.