A.T. Robertson Commentary Luke 2:21

"And when eight days were fulfilled for circumcising him, his name was called JESUS, which was so called by the angel before he was conceived in the womb." — Luke 2:21 (ASV)

His name was called Jesus (κα εκληθη το ονομα αυτου Ιησους). The κα is left untranslated or has the sense of "then" in the apodosis. The naming was a part of the ceremony of circumcision as is shown also in the case of John the Baptist (Luke 1:59–66).