| Jabar | Jabo | Jabsi | Jack |
| Jacker | Jackie | Jacko | Jackob |
| Jackpot | Jacks | Jackson | Jacky |
| Jacob | Jada | Jade | Jadore |
| Jaen | Jafar | Jaffa | Jaga |
| Jagger | Jaguar | Jahsra | Jaika |
| Jaja | Jakari | Jake | Jakhart |
| Jalapeïo | Jali | Jalisca | Jalla |
| Jalna | Jam | Jama | Jamal |
| Jamba | Jambo | James | Jami |
| Jamo | Jana | Janca | Jane |
| Janek | Janel | Janga | Jango |
| Janila | Janis | Jankana | Janky |
| Jannek | Jano | Jansie | Janus |
| Jappy | Jara | Jarda | Jareck |
| Jarka | Jarko | Jaro | Jary |
| Jasco | Jasgo | Jaska | Jaskya |
| Jasomir | Jason | Jaspar | Jasper |
| Jaste | Jatt | Java | Javel |
| Javo | Javy | Jawa | Jaws |
| Jax | Jaya | Jayce | Jazou |
| Jazz | Jazzy | Jea | Jeans |
| Jeck | Jecko | Jed | Jedi |
| Jeep | Jeeppy | Jeety | Jekyll |
| Jela | Jellie | Jena | Jeni |
| Jenka | Jenna | Jennjenna | Jenny |
| Jens | Jensine | Jenska | Jenta |
| Jerky | Jero | Jerreco | Jersey |
| Jesko | Jesper | Jespsi | Jess |
| Jessie | Jessy | Jessyko | Jesta |
| Jethro | Jetta | Jette | Jetto |
| Jeva | Jewel | Jexie | Jeywood |
| Jezebel | Jhoery | Jib | Jibsy |
| Jicy | Jig | Jigoto | Jigsaw |
| Jilbo | Jildo | Jilke | Jilly |
| Jilo | Jilou | Jim | Jima |
| Jimba | Jimbo | Jimi | Jimm |
| Jimmy | Jina | Jinka | Jinna |
| Jinx | Jipito | Jipsa | Jiska |
| Jisy | Jitta | Jive | Jixi |
| Jixia | Joba | Jobi | Jobo |
| Jochy | Jock | Jocker | Jocki |
| Jocya | Joda | Joerca | Joerg |
| Joeri | Joetta | Joga | Jogl |
| JOGO | Joho | Joi | Jojo |
| Jojoba | Joka | Joke | Joker |
| Jokos | Joli | Jolia | Jolla |
| Jolly | Joma | Jonda | Jonka |
| Jook | Joop | Jopie | Joran |
| Jordi | Joric | Jorina | Joris |
| Jork | Jorka | Jorky | Jorrox |
| Jorso | Jorus | Jory | Josca |
| Joscha | Joschy | Josie | Joska |
| Josko | Joss | Jota | Jouck |
| Jouk | Joumia | Jouna | Jovia |
| Joy | Joyce | Jubel | Jubilee |
| Jubkos | Jucki | Jucks | Juddij |
| JUDE | Judge | Judika | Judo |
| Judor | Judy | Juelchen | Juffa |
| Juffer | Jujube | Juka | Jukas |
| Juke | Juky | Jules | Julexa |
| Julia | Julischka | Julka | Juma |
| Jumanji | Jumba | Jumbo | Jummi |
| Jump | Jumper | Juna | June |
| Jung | Jungle | Jungo | Junior |
| Junios | Juniper | Junko | Junkos |
| Junky | Juno | Jupiter | Jupp |
| Juppi | Jurek | Jurg | Jurix |
| Juscha | Juschka | Jusco | Jussia |
| Justin | Justintime | Justy | Jute |
| JUVISY | Juwel | Juxa | Jylka |