J.A.G. J.B. J.C. J.F.K. J.P. Jabal Jabba Jabbar Jabberwocky Jabot Jacalyn Jacanz Jacinth Jack Jackdandy Jackal Jackaroo Jackelyn Jackhammer Jackie Jacknife Jacko Jackoby Jackpile Jackpot Jackrabbit Jackson Jacob Jacobina Jacquard Jacqueline Jacquerie Jacuzzi Jade Jaded Jadeite Jaeger Jael Jaffa Jag Jaggar Jaguar Jailbait Jaime Jake Jakoba Jalape Jalapeno Jalopy Jam Jamaica Jamal Jambalaya Jamboree Jameel James Jamie Jamma Jammies Jamshid Jan Jana Janacek Jane Janeane Janet Jangle Jangles Janice Janie Jannings Janov January Janus Japheth Japheth Jared Jargon Jarrah Jarreau Jarred Jarrell Jarvis Jas Jasmine Jason Jasper Jassid Jat Jataka Jaunt Java Jaworski Jaws Jay Jaybird Jaycee Jazz Jazzy Jean Jeanette Jeannie Jed Jedi Jeep Jeeves Jefferson Jeffrey Jekyll Jello Jelly Jemima Jena Jenkins Jennings Jenny Jensen Jenufa Jeopardy Jerboa Jeremia Jeremiah Jeremy Jeris Jerky Jermaine Jerold Jerome Jerrie Jerry Jersey Jerubbaal Jerusalem Jess Jesse Jessel Jessica Jessie Jessup Jester Jesuit Jet Jeth Jethro Jetty Jewels Jezebel Jib Jicko Jiffy Jig Jigger Jigs Jigsaw Jill Jillian Jimjams Jimmie Jimmy Jingle Jingles Jingo Jinja Jinker Jinsen Jinx Jitterbug Jives Jo JoJo Joanie Jobber Jocasta Jocelyn Jock Jockey Jodi Joe Joel Joey John Johnny Johnson Jojo Jojoba Joker Jokester Joliet Jolly Jolson Jonah Jonas Jonathan Jones Jonesie Jong Jonquil Joplin Jordache Jordan Jordie Jorel Jorge Jorgensen Jorgie Jose Joseph Josephine Josette Joshua Josie Joslyn Josphina Joss Josylen Jove Jovian Jowls Joy Joyce Joyful Joyride Jr. Juan Juanita Jubilee Judah Judas Judd Judge Judith Judo Judy Jughead Juice Juicer Juilliard Jujutsu Jukebox Julep Jules Julia Juliana Juliet Julio July Jumanji Jumbo Jumper June Jung Junior Juniper Juno Jupiter Jurassic Jurgensen Juror Jury Justin Justina Justine Justus