Disambiguation: Marvel Boy / Marvel Man / Quasar, Earth-616
First published in: 1978
Marvel Boy created by Don Glut, Roy Thomas, and John Buscema.
Wendell Vaughn first appeared as Marvel Boy in Captain America (Marvel, 1968 series) #217 (January 1978). He called himself Marvel Man beginning in Captain America (Marvel, 1968 series) #218 (February 1978). He changed his codename to Quasar in The Incredible Hulk (Marvel, 1968 series) #234 (April 1979). Quasar was chosen by Eon to be Protector of the Universe in Quasar (Marvel, 1989 series) #2 (November 1989).
Link: https://en.wikipedia.org/wiki/Quasar_(Wendell_Vaughn)