| Iounia | | - | Biblical Greek | |
| Iovianus | | - | Ancient Roman | |
| Iovita | | - | Ancient Roman | |
| Iqbal | | - | Arabic | |
| IrÉNÉE | | ee-re-NE | French | |
| IrÈNe | | ee-REN | French | |
| Ira (1) | | IE-rə (English) | Biblical, English, Hebrew | |
| Irena | | ee-RE-nah (Polish), ee-RAY-nah (Dutch) | Polish, Czech, Slovene, Croatian, Serbian, Dutch, Lithuanian | |
| Irenaeus | | - | Ancient Greek (Latinized) | |
| Irene | | ie-REEN (English), ie-REE-nee (English), ee-RE-ne (Italian), EE-re-ne (Finnish), ee-RE-nu (German) | English, Italian, Spanish, Portuguese, Swedish, Norwegian, Danish, Finnish, German, Ancient Greek (L | |
| Ireneus | | - | Ancient Greek (Latinized) | |
| Irenka | | ee-REN-kah (Polish) | Polish, Czech | |
| Irfan | | - | Arabic | |
| Iria | | - | Portuguese, Galician | |
| Irina | | ee-REE-nah (Russian), EE-ree-nah (Finnish) | Russian, Bulgarian, Macedonian, Romanian, Finnish, Georgian | |