Possible Clues:

• Survivor of Krypton's destruction
• Superman's name on Krypton
• Krypton tyke
• Lara's son, in DC Comics
• Infant who escaped Krypton
• Superman's other name
• Superman, to his father
• Foe of 130-Across, at birth
• 38-Down's nemesis, originally
• Birth name of Smallville's most famous resident