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Created by Jerry Siegel and Curt Swan

The Original Universe


Real Name: Jo Nah
Homeworld: Rimbor
Race: Rimborian
Marital Status: Single
Known Relatives: Crav Nah (father), Mytra Nah (mother)
Base of Operation: Legion Headquarters, 31st Century Earth
Group Affiliation(s): Legion of Super-Heroes
Gender: Male
Height: 6'0"
Weight: 190 lbs.
Eyes: Brown
Hair: Brown
First Appearance: Superboy Vol. 1 #98/2 (July 1962)
Creators: Jerry Siegel and Curt Swan


Jo Nah of Rimbor was flying his one-man craft near his homeworld when he was swallowed by an ultra-energy beast. After being rescued, he learned that exposure to the radiation while inside gave him a number of superpowers, though he could only use one of them at a time. He soon joined the Legion of Super-Heroes, and later became romantically involved with Phantom Girl.


For a definitive list of appearances of Ultra Boy in chronological order click here


Who's Who: The Definitive Directory of the DC Universe #24 (February 1987)

Who's Who in the Legion of Super-Heroes #7 (November 1988)
Who's Who in the DC Universe #5 (December 1990)


Notable variants of Ultra Boy include the Earth-247 and Earth-Prime versions.