Superman's Girl Friend, Lois Lane #23 (1961) reveals the Silver Age Lex Luthor parents are Jules and Arlene and that he has a younger sister Lena. When Lex becomes a criminal, the family moves away from Smallville and changes its name to Thorul (an anagram) to start a new life free of him. Lena Thorul is a toddler at the time and grows up not remembering her real last name, while her parents say her older brother died in a mountain climbing accident. Lex later watches over the adult Lena, making sure she does not discover her connection to one of Earth's greatest villains.