| Ruler | Kingdom | Era |
|---|---|---|
| Mr. Grom | 47 | |
| Mr. Grom | 48 | |
| Mr. Grom Hellscream | 47 | |
| Mr. Grom Hellscream | Blood And Sand | 48 |
| Mr. Gromal | 48 | |
| Mr. Grombeer | Kingdom Hearts | 48 |
| Mr. Grombeer | 48 | |
| Mr. Grombeer | 48 | |
| Mr. Grombeer | 48 | |
| Mr. Grombrindal | 48 | |
| Mr. Grombrindal | 48 | |
| Mr. Gromc | 48 | |
| Mr. Gromhellscream | 48 | |
| Mr. Gromish Hellscream | 48 | |
| Mr. Gromit | 48 | |
| Mr. Gromwald Gretski | Federation | 47 |
| Mr. Gromwald Gretski | Federation | 47 |
| Mr. Orggrangromash | 48 | |