| Irmhild | | EERM-hilt | German | |
| Irmingard | | EER-min-gahrt | German | |
| Irmtraud | | EERM-trowt | German | |
| Irmtrud | | EERM-troot | German | |
| Irmuska | | EER-moosh-kaw | Hungarian (Rare) | |
| Irune | | - | Basque | |
| Iryna | | ee-RI-nah | Ukrainian | |
| Isa (1) | | - | Arabic | |
| Isa (2) | | EE-sah: (Dutch) | German, Dutch, Italian, Spanish | |
| Isa (3) | | - | Frisian, Ancient Germanic | |
| Isaac | | IE-zək (English) | English, Jewish, Biblical, Biblical Latin | |
| Isaak | | ee-SAH-ahk (Russian) | Russian, German, Biblical Greek | |
| Isaaku | | - | Old Church Slavic | |
| IsabÈL | | - | Occitan | |
| Isabel | | ee-sah-BEL (Spanish), IZ-ə-bel (English), ee-za-BEL (French), ee-zah-BEL (German) | Spanish, Portuguese, English, French, German | |