| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 521 | Gregoly | Greek | Vigilant. | M | |
| 522 | Gregor | Greek | Variant of Gregory: Watchful or vigilant. | M | |
| 523 | Gregorie | Greek | Vigilant. | M | |
| 524 | Gregorior | Greek | Vigilant. | M | |
| 525 | Gregory | Greek | Watchful. Famous bearer: American actor Gregory Peck, and Pope Gregory I who was also known as St Gregory the Great. | M | |
| 526 | Gregos | Greek | Vigilant. | M | |
| 527 | Grigor | Greek | Vigilant. | M | |
| 528 | Grigorov | Greek | Vigilant. | M | |
| 529 | Gruev | Greek | Vigilant. | M | |
| 530 | Guilio | Greek | Young. | M | |
| 531 | Gyes | Greek | A Titan. | M | |
| 532 | Gyoergy | Greek | Farmer. | M | |
| 533 | Gyorgy | Greek | Farmer. | M | |
| 534 | Gyuri | Greek | Farmer. | M | |
| 535 | Gyurka | Greek | Farmer. | M | |
| 536 | Haemon | Greek | Son of Creon. | M | |
| 537 | Hali | Greek | Sea. | M | |
| 538 | Halirrhothius | Greek | Son of Poseidon. | M | |
| 539 | Halithersis | Greek | Seer who warns Penelope's suitors. | M | |
| 540 | Hector | Greek | Holding fast; bully. Steadfast. | M | |