| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Gratianus | - | Ancient Roman | ||
| Grigore | - | Romanian | ||
| Guenevere | - | Arthurian Romance | ||
| Guinevere | GWIN-ə-vir (English) | Arthurian Romance | ||
| Guiomar | gee-oo-MAR (Portuguese), gee-o-MAHR (Spanish) | Portuguese, Spanish, Arthurian Romance | ||
| Gwenhwyfar | - | Welsh Mythology, Arthurian Romance | ||
| Hadriana | - | Ancient Roman | ||
| Hadrianus | - | Ancient Roman | ||
| Haralamb | - | Romanian | ||
| Hector | HEK-tər (English) | English, French, Greek Mythology (Latinized), Arthurian Romance | ||
| Hercules | HUR-kyə-leez (English) | Roman Mythology | ||
| Herminia | er-MEE-nyah (Spanish) | Spanish, Ancient Roman | ||
| Herminius | - | Ancient Roman | ||
| Hersilia | - | Roman Mythology | ||
| Hilaria | ee-LAH-ryah (Spanish) | Ancient Roman, Spanish |