| Name | Meaning | Gender | Origin |
|---|
| Gavenia | White hawk
| Female | |
| Gem | A mineral that has been cut and polished | Unisex | |
| Gemini | The Twins | Male | Latin |
| Gemma | precious stone | Female | Italian |
| Gilgamesh | | Unisex | Hebrew |
| Giza | Hewn Stone | Unisex | Hebrew |
| Gunnar | bold warrior | Male | Scandinavian |
| Gwendolyn | White, pure
| Female | English |
| Hades | World of the dead or hell. | Male | |
| Hecate | Mythical Witchcraft Goddess | Unisex | Greek |
| Helios | Sun | Unisex | Greek |
| Heloise | healthy; wide | Female | |
| Hercules | glory of Hera | Male | Greek |
| Hermes | the messenger god | Male | Greek |
| Idalis | | Unisex | Hebrew |
| Iliana | from Ilium or Troy | Female | Greek |
| Indigo | A dark blue plant dye | Female | Greek |
| Io | pronounced: Ee-Oh | Female | Greek |
| Iris | rainbow, a play of colours | Female | |
| Jade | Jewel. Courageous and adoring.
| Female | Spanish |
| Jana | Feminine variation of John | Female | Czech |
| Javan | Son of Japtheth
| Male | Hebrew |
| Jennet | God is gracious | Female | Old |
| Jet | A deep black colour. Aircraft engine that propels an aircraft forward by expelling exhaust gases toward the rear. | Male | Mineral |
| Juniper | Juniper Tree | Female | English |