Matthew 1:25

25andκαὶnotοὐκknewἐγίνωσκενherαὐτὴνuntilἕωςthatοὗshe had brought forthἔτεκενa sonυἱόν·andκαὶhe calledἐκάλεσενtheτὸnameὄνομαof HimαὐτοῦJesusἸησοῦν.

And he did not know her until she bore a Son, and he called His name Jesus.