| Name | Meaning | Gender | Origin |
|---|
| Greebo | after the witch's cat in the Terry Pratchett discworld novels | Unisex | |
| Griddlebone | | Unisex | Hebrew |
| Growltiger | | Unisex | Hebrew |
| Gumball | | Unisex | Hebrew |
| Gummitch | | Unisex | Hebrew |
| Happy | Showing satisfaction or joy | Female | English |
| Heart | | Unisex | Hebrew |
| Hello Kitty | | Unisex | Hebrew |
| Itchy | | Unisex | Hebrew |
| Jasmine | Flower
| Female | Persian |
| Jellylorum | | Unisex | Hebrew |
| Jennie | English, God's gracious gift | Female | English |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Jenny | Diminutive of Jane and Jennifer.
| Female | English |
| Kat | pure | Female | English |
| Kiara | Italian, light, clear | Female | Spelling |
| Kirara | | Unisex | |
| Kitten | | Unisex | |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Korky | | Unisex | |
| Krazy | | Unisex | Hebrew |
| Krazy Kat | | Unisex | Hebrew |
| Kyo | Approval, Ginger, Or Large | Unisex | Japanese |