| Isi | | - | Native American, Choctaw | |
| Isidor | | EE-see-dawr (German) | German, Russian, Macedonian | |
| Isidora | | ee-see-DHO-rah (Spanish), ee-zee-DO-rah (Italian), iz-i-DAWR-ə (English) | Serbian, Macedonian, Spanish, Portuguese, Russian (Rare), Italian (Rare), English (Rare), Ancient Gr | |
| Isidore | | IZ-i-dawr (English), ee-zee-DOR (French) | English, French, Georgian, Jewish | |
| Isidoro | | ee-see-DHO-ro (Spanish), ee-zee-DO-ro (Italian) | Spanish, Italian | |
| Isidoros | | - | Ancient Greek | |
| Isidorus | | - | Late Roman | |
| Isidro | | - | Spanish | |
| Isingoma | | - | Eastern African, Ganda | |
| Isis | | IE-sis (English) | Egyptian Mythology (Hellenized) | |
| Iskandar | | - | Arabic, Indonesian, Malay | |
| Iskra | | - | Bulgarian, Macedonian, Croatian, Serbian | |
| Ismael | | - | Spanish, Biblical Greek | |
| Ismahel | | - | Biblical Latin | |
| Ismail | | - | Arabic, Uyghur | |