| Inez | | - | English | |
| Ingram | | ING-grəm | English | |
| Inigo | | IN-i-go | English (Rare) | |
| Iola | | - | English | |
| Iona (1) | | ie-ON-ə (English) | English, Scottish | |
| Ione | | ie-O-nee (English), IE-o-nee (English), ie-ON (English) | Greek Mythology, English | |
| Ira (1) | | IE-rə (English) | Biblical, English, Hebrew | |
| Ireland | | IER-lənd | English (Modern) | |
| 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 | |
| Iris | | IE-ris (English), EE-ris (German, Dutch), EE-rees (Finnish, Spanish) | Greek Mythology, English, German, Dutch, Swedish, Norwegian, Danish, Finnish, French, Spanish | |
| Irma | | EER-mah (German, Finnish), UR-mə (English) | German, English, Dutch, Finnish, Spanish, Italian, Georgian, Lithuanian, Hungarian (Rare), Ancient G | |
| Irvin | | UR-vin | English | |
| Irvine | | UR-vien, UR-vin | English, Scottish | |
| Irving | | UR-ving (English, Scottish) | English, Scottish, Jewish | |
| Irwin | | UR-win | English | |