Parallel
Luke 2:5
Nestle 1904 Greek New Testament · Berean Standard Bible
ἀπογράψασθαι σὺν Μαριὰμ τῇ ἐμνηστευμένῃ αὐτῷ οὔσῃ ἐγκύῳ
He went there to register with Mary, who was pledged to him in marriage and was expecting a child.