| Abbreviation | Definition |
|---|---|
| JB | John Bullard |
| JB | Johnny Blaze |
| JB | Jonathan Burns |
| JB | Joseph Bailey |
| JB | Justin Bieber |
| JBJ | Jon Bon Jovi |
| JBL | John Bradshaw Layfield |
| JBL | Johns Brook Lodge |
| JBN | Jesper B. Nielsen, Danish knife maker |
| JBP | John B. Pike |
| JBS | Joel B. Snyder |
| JBT | John Bigelow Taylor |
| JBY | John Butler Yeats |
| JBZ | Joseph B. Zwischenberger, MD |
| JC | Jack Callahan |
| JC | James Cameron |
| JC | James Clifford |
| JC | James Cordell |
| JC | James Cunningham |
| JC | Jimmy Carter |