| Name | Meaning | Gender | Origin |
|---|
| Gossamer | | Unisex | Hebrew |
| Gotham | | Unisex | Hebrew |
| Granite | | Male | Hebrew |
| Gray | English, the son of the bailiff | Male | Color |
| Gregory | vigilant, a watchman | Male | Greek |
| Grendel | Legend Name | Unisex | Anglo-Saxon |
| Grey | Gray-Haired. | Male | English |
| Grimm | Fierce | Unisex | Anglo-Saxon |
| Hades | World of the dead or hell. | Male | |
| Hadrian | dark-haired | Male | Latin |
| Hannibal | grace of Baal, god of fertility and fortune | Male | Punic |
| Hawk | hawk, a bird | Male | Nature |
| Hecate | Mythical Witchcraft Goddess | Unisex | Greek |
| Hero | demi-god | Male | Greek |
| Hitchcock | | Unisex | Hebrew |
| Ira | watchful, descendant | Male | Hebrew |
| Ivory | The hard, smooth, yellowish-white of an elephant's tusk. | Male | Word |
| Jack | after the Georgetown University mascot, Jack the Bulldog | Male | English |
| Jack | From John - God's gracious gift | Male | English |
| Jean | God is gracious | Male | |
| Keegan | A thinker: fiery. Form of Hugh.
| Male | Irish |
| Keiran | Little, Dark | Unisex | Celtic |
| Kelby | Dark: dark-haired.
| Male | English |
| Keri | Black, Dark | Unisex | English |
| Kerry | dark, dark-haired | Male | Irish |