| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Ian | EE-ən (English) | Scottish, English | ||
| Ibb | - | Medieval English | ||
| Ibbie | IB-ee | English | ||
| 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 | ||
| Ike | IEK | English | ||
| Ilbert | - | English (Rare) | ||
| Ilean | ie-LEEN | English (Rare) | ||
| Ileen | ie-LEEN | English (Rare) | ||
| Ilene | ie-LEEN | English | ||
| Imogen | IM-ə-jən | English (British) |