Matthew gives Joseph’s genealogy—Luke gives Mary’s. Luke does not say Heli “begat” Joseph. Joseph was his son-in-law. If Jesus was the son of Joseph, as some claim, He is forever barred from the throne, being a descendant of Coniah who was cursed, that none of his line might have the throne. Jesus was accordingly conceived by the Holy Ghost in Mary, Mary’s father being a descendant of David through another line.