Lex Luthor, Jr.

Lex Luthor, Jr. is the son of Lex Luthor and Ardora Luthor. He was born on the planet Lexor. He was killed when an accident caused the entire planet Lexor to be destroyed. Luthor blames Superman for Lex Jr.'s death, even though he was not responsible.

Reference
Super Powers (Volume One)
 * Super Powers Vol 1 1