| Ruler | Kingdom | Era |
|---|---|---|
| Mr. Ajeff | 39 | |
| Mr. Ajeff | 39 | |
| Mr. Jeff | 23 | |
| Mr. Jeff | Cannabis | 24 |
| Mr. Jeff | Pirates | 24 |
| Mr. Jeff | Earth Peace | 24 |
| Mr. Jeff | 25 | |
| Mr. Jeff | Knights of Camelot | 30 |
| Mr. Jeff | 47 | |
| Mr. Jeff | 48 | |
| Mr. Jeff | 48 | |
| Mr. Jeff Steveng | 48 | |
| Ms. Jeffef | 48 | |
| Mr. Jefferson Davis | 26 | |
| Mr. Jefferson Davis | rebels | 26 |
| Mr. Jefferson Davis | rebels | 27 |
| Mr. Jefferson Davis | Confederate States of America | 48 |
| Mr. Jefferson Davvis | rebels | 27 |
| Mr. Jefferson Dwarf | The Federation | 48 |
| Mr. Jeffery | 48 | |
| Mr. Jeffey | 48 | |
| Mr. Jeffguy | 48 | |
| Mr. Jeffling | 48 | |
| Mr. Jeffling | 48 | |
| Mr. Jefflol | 38 | |
| Mr. Jeffman | 48 | |
| Mr. Jeffree | 44 | |
| Mr. Jeffrey | Some Guys | 47 |
| Mr. Jeffrey | Some Guys | 48 |
| Mr. Jeffrey Epstein | 48 | |
| Mr. Jeffury | 48 | |
| Mr. Jeffury I | 48 | |
| Mr. Jeffwinger | Shadows of Dawn | 48 |
| Mr. Jeffy | The Legion | 25 |
| Mr. Jeffy | 48 | |
| Mr. Jeffy | 48 | |
| Mr. Majeff | 39 | |
| Mr. Thomas Jefferson | 31 | |