| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| 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) | ||
| Imogene | IM-ə-jeen | English | ||
| Ina | EE-nə (English), IE-nə (English), EE-nah (Swedish, Dutch, Limburgish) | English, German, Swedish, Norwegian, Danish, Dutch, Limburgish, Croatian | ||
| India | IN-dee-ə | English | ||
| Indiana | in-dee-AN-ə | English | ||
| Indigo | IN-di-go | English (Rare) |