| Ipati | | - | Russian (Rare) | |
| Ipatiy | | - | Russian (Rare) | |
| Ippolit | | - | Russian | |
| Ippolito | | - | Italian | |
| IrÉN | | - | Hungarian | |
| Ira (2) | | - | Russian | |
| Irakli | | - | Georgian | |
| Irakliy | | - | Russian | |
| 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) | |
| Iria | | - | Portuguese, Galician | |
| Irina | | ee-REE-nah (Russian), EE-ree-nah (Finnish) | Russian, Bulgarian, Macedonian, Romanian, Finnish, Georgian | |
| Irine | | - | Georgian | |