| Name | Meaning | Gender | Origin |
|---|
| Garrick | one who governs with a spear | Male | Teutonic |
| George | Farmer. In medieval legend St. George: (the knight who became patron saint of England) struggled with a fire-breathing dragon symbolizing the Devil.
| Male | Greek |
| Gideon | The destroyer; brave spirit. mighty warrior. | Male | Hebrew |
| Ginny | virginal | Female | English |
| Graham | gravelly homestead | Male | Scottish |
| Granger | farmer | Male | English |
| Grawp | Hagrid's half-brother.
| Male | |
| Gregory | vigilant, a watchman | Male | Greek |
| Grubbly-Plank | | Unisex | |
| Hagrid | | Male | Hebrew |
| Hannah | From Anne - Full of grace of God | Female | Hebrew |
| Harper | Harpist: minstrel.
| Female | English |
| Harry | estate ruler | Male | English |
| Harry | estate ruler | Male | English |
| Hedwig | after the musical/movie Hedwig and the Angry Inch | Female | |
| Helena | bright, shining one | Female | Latinate |
| Helga | Pious
| Female | Scandinavian |
| Hepzibah | my delight is in her | Female | Hebrew |
| Hermes | the messenger god | Male | Greek |
| Hermione | messenger, earthly | Female | Greek |
| Hestia | hearth, fireside | Female | Greek |
| Hooch | | Unisex | Hebrew |
| Horace | timekeeper | Male | Latin |
| Hufflepuff | | Female | Hebrew |
| Humphrey | peaceful warrior | Male | |