Superbaby

The infant Kal-El. Although tales of Superman's early life are now referred to as "Superbaby stories," Superbaby was not his official name at the time, and his presence was generally unknown; Clark Kent's first secret identity was Superboy.

Reference and Usage:

"There had been rumors floating around the region about a super-powered tot almost since the day of young Clark's arrival on Earth. At parties, on hayrides, in local newspaper offices and the like, people would swear that they had seen a three-year-old boy punch a timber wolf and fly away. Or people would tell about others they knew who told some such story.

With each rash of new super-baby sightings there invariably seemed to follow an outbreak of tales of a werewolf in some cavern, or a 100-year-old Indian medicine man who hid out in the woods, or the old reliable flying saucers." (LSOK, Ch. 11)