| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Iorwerth | - | Welsh | ||
| Iosif | ee-O-seef (Russian), YO-seef (Romanian) | Russian, Romanian, Greek | ||
| Iosifu | - | Old Church Slavic | ||
| Ipati | - | Russian (Rare) | ||
| Ipatiy | - | Russian (Rare) | ||
| Ippolit | - | Russian | ||
| Ira (1) | IE-rə (English) | Biblical, English, Hebrew | ||
| Ira (2) | - | Russian | ||
| Irakliy | - | Russian | ||
| Irati | - | Basque | ||
| Ireland | IER-lənd | English (Modern) | ||
| Irena | ee-RE-nah (Polish), ee-RAY-nah (Dutch) | Polish, Czech, Slovene, Croatian, Serbian, Dutch, Lithuanian | ||
| 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 | ||
| Ireneusz | ee-re-NE-uwsh | Polish | ||
| Irenka | ee-REN-kah (Polish) | Polish, Czech |