ὄρνιθι γὰρ καὶ τὴν τότ᾽ αἰσίῳ τύχην παρέσχες ἡμῖν → for it was by a good omen that you provided that past fortune to us
gén. de ἡμεῖς, v. ἐγώ.
genitive case plural of ἐγώ; of (or from) us: our (company), us, we.
ἡμῶν: gen. pl. к ἐγώ.