Alexander Luthor of Earth-3
Alexander Luthor (of Earth-3)
Alexander Luthor teamed up with Superman and Superman of Earth-2 to defeat the dreaded team of Lex Luthor, Alexei Luthor of Earth-2, and Ultraman of Earth-3 (DCCPA No. 1, 1982: "Crisis on Three Earths!").
Alexander had only one son with his wife, the Lois Lane of Earth-3. They named the child Alexander Luthor, Jr., and he later became a superhero like his father, wearing a golden suit of armor during his brief career.