Disambiguation: Jimmy Olsen
First published in: 1958
Jimmy Olsen first appeared, as an unnamed office boy, in Action Comics (DC, 1938 series) #6 (November 1938). He first became Elastic Lad in Superman's Pal, Jimmy Olsen (DC, 1954 series) #31 (September 1958).
Link: https://en.wikipedia.org/wiki/Jimmy_Olsen#The_Weisinger_Era