| Name | Meaning | Gender | Origin |
|---|
| Heathcliff | From the heath cliff
| Male | English |
| Hector | Tenacious
| Male | Greek |
| Hello Kitty | | Unisex | Hebrew |
| Henri | Ruler Of The Home | Unisex | French |
| Henrietta Pussycat | | Unisex | Hebrew |
| Hershey | Brand of chocolate. | Male | |
| Hobbes | bright fame | Male | English |
| Hodge | | Male | Hebrew |
| Hot Dog | | Unisex | Hebrew |
| Huckle | | Unisex | Hebrew |
| Humphrey | peaceful warrior | Male | |
| Icky | | Unisex | Hebrew |
| Igor | Scottish variation of Welsh Ifor, lord or English form of Scandinavian Ifar, yew | Male | Russian |
| Itty | | Unisex | Hebrew |
| Ivan | Form of John | Male | Russian |
| Jack | after the Georgetown University mascot, Jack the Bulldog | Male | English |
| Jack | From John - God's gracious gift | Male | English |
| Jackson | Son of Jack | Male | English |
| Jagger | a teamster | Male | English |
| Jake | From Jacob - To fill the place of another | Male | Hebrew |
| James | From Jacob - To fill the place of another, supplanter. | Male | English |
| James Brown | | Unisex | Hebrew |
| Jarvis | driver, a conqueror | Male | English |
| Jason | the Lord is salvation | Male | Hebrew |
| Jasper | Black stone
| Male | Persian |