johnny bravo.
The Joker?Juggernaut (X-men)
Jerry, from Tom and Jerry
Judy Jetson the jetsons the jetsons
Jade or Jackie Chan from Jackie Chan Adventures.
Jonny test
jimmy neutron
Jerry, from tom and jerry
Jerry as in Tom and Jerry.
jerry from tom and jerry
Jughead, Jane Jetson, The Joker and Jerry (Tom & Jerry) are cartoon/comic book characters. They begin with the letter J.
Jasmine and Jafar are characters in Aladdin. They begin with J.
It is an 'homage' to Jay Ward who gave his characters the middle initial of "J" (Rocket J. Squirrel, Bullwinkle J. Moose), who in addition to using his own name as an 'initial', may have been paying homage to Warner Bros. Elmer J. Fudd ("I am Elmer J. Fudd - I own a mansion und a yacht.")