| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| I&Eth;Unn | - | Norse Mythology, Ancient Scandinavian | ||
| Iahmesu | - | Ancient Egyptian | ||
| Ian | EE-ən (English) | Scottish, English | ||
| Ianuarius | - | Ancient Roman | ||
| Iason | - | Greek Mythology, Ancient Greek, Greek, Biblical Greek, Biblical Latin | ||
| Ibb | - | Medieval English | ||
| Ibbie | IB-ee | English | ||
| Ibragim | - | Chechen, Ossetian | ||
| Ida | IE-də (English), EE-dah (German, Swedish, Danish, Dutch, Italian) | English, German, Swedish, Norwegian, Danish, Dutch, Italian, Spanish, Portuguese, Hungarian, Slovene | ||
| Idella | ie-DEL-ə | English | ||
| Idelle | ie-DEL | English (Rare) | ||
| Idonea | - | English (Archaic) | ||
| Idony | - | English (Archaic) | ||
| Iggy | - | English | ||
| Ignac | - | Slovene |