| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Gianna | JAHN-nah (Italian), YAH-nah (Greek) | Italian, Greek | ||
| Gianni | JAHN-nee (Italian) | Italian, Greek | ||
| Giannis | YAH-nees | Greek | ||
| Giorgos | - | Greek | ||
| Glaucus | - | Greek Mythology (Latinized) | ||
| Glaukos | - | Greek Mythology | ||
| Glykeria | - | Greek | ||
| Gregorios | - | Greek, Late Greek | ||
| Gregorius | - | Late Greek (Latinized) | ||
| Gus (2) | GUS | Greek | ||
| Hades | HAY-deez (English) | Greek Mythology (Latinized) | ||
| Hagne | - | Ancient Greek | ||
| Halcyone | - | Greek Mythology (Latinized) | ||
| Halkyone | - | Greek Mythology | ||
| Hananias | - | Biblical Greek |