Lex Luthor was born in Suicide Slum in Metropolis, where he was raised by his parents, Lionel and Lillian. His sister Lena was born when Lex was five, and the two kept each other sane in the not so quiet Luthor household. At the age of eleven, after his brother Julian was born, Lex lost both his mother and brother due to birth complications. This put a heavy strain on Lex's already fragile young mind, thanks in part to his father's egomaniacal upbringing. Lena left after an argument with Lionel, leaving Lex alone with their overbearing father.