Joey JoJo Junior Shabadoo
Lest anyone need a refresher on who this was, he was a character in a Pogo story arc, a satire of Sen. Joseph McCarthy. Entire story here:
Another short-lived animated series that few probably remember was Calvin And The Colonel, a parody of Amos And Andy, featuring Colonel Montgomery J. Klaxon, which lasted for all of portions of two seasons. Here is Season 1, Episode 1:
J Wellington Wimpy.
John Jacob Jingleheimer-Smith.
J Jonah Jameson from Spiderman comes to mind (he’s been on cartoons on TV several times even if he’s primarily a comic character).
Possibly James ‘J.J.’ Evans, Jr. from the show Good Times. I don’t know what the second J in ‘J.J.’ is though, perhaps it’s just Jr.
Jimmie ‘J.J.’ Walker who played him does not have a real middle initial J, his middle name is Carter.
And yet it’s Jesus H. Christ.