| Isra | Unisex | Arabic Names |
| Israel | Man | Hebrew Names |
| Issa | Man | Arabic Names |
| Issay | Man | African Names |
| Issoria | Woman | Greek Names |
| Istas | Woman | Native American - Cheyenne Names |
| Isthia | Woman | American Names |
| Istvan | Man | Hungarian Names |
| Ita | Woman | Spanish Names |
| Itachi | Man | Japanese Names |
| Itai | Man | Hebrew Names |
| Itala | Woman | Italian Names |
| Italia | Woman | Italian Names |
| Itamar | Man | Hebrew Names |
| Ithaca | Unisex | Greek Names |
| Itotia | Unisex | Aztec Names |
| Itsuki | Man | Japanese Names |
| Itsuko | Woman | Japanese Names |
| Itsuo | Man | Japanese Names |
| Itxaro | Woman | Basque Names |