Jesus himself, when he began to teach, was about thirty years old, being the son (as was supposed) of Joseph, the son of Heli,
Matthew’s genealogy shows that Jesus had legal right to the throne of David, for he was in the royal line of descent that came through Solomon and other kings of Judah down to Joseph. Jesus therefore fulfilled the promise that the Messiah would be one of David’s royal descendants (2 Samuel 7:12-16; Jeremiah 23:5). But both writers point out that though Joseph was Jesus’ legal father he was not his natural father (Matthew 1:16; Luke 3:23).