J'Onn J'Onzz, Big Green Buddy, J.J., Jolly Green Giant, Light to the Light, Manhunter, Manhunter from Mars, Son of Mars, Bronze Wraith, Bloodwynd, many others
JJ, JJJ, Jolly Jonah, Jameson J. Jonah, Jackal, Jolly Jameson, Jiggsaw Jameson, Flat-Top, Buzz Head Prune, Face Pinkle, Puss Mayor Jameson