The mother of Lex Luthor is known as Lillian, Arlene or Leticia Luthor. She is the wife of Lionel Luthor and also the adoptive mother of Lena Luthor and aunt of Lori Luthor. Treated with little consistency, she is either in hiding, long dead or a criminal mastermind herself.
Luthor's mother was created by Jerry Siegel and Kurt Schaffenberger, first appearing as Arlene Thorul in Superman's Girl Friend, Lois Lane #23 (1961).
Multiverse
Prime Earth
Lex's aunt
New Earth
Lex Luthor: The Biography
Earth 96
DC Super Hero Girls
Other Media