| Iacopo | | - | Italian | |
| Ida | | IE-də (English), EE-dah (German, Swedish, Danish, Dutch, Italian) | English, German, Swedish, Norwegian, Danish, Dutch, Italian, Spanish, Portuguese, Hungarian, Slovene | |
| Ignazio | | - | Italian | |
| Ilaria | | - | Italian | |
| Ilario | | - | Italian | |
| Ilda | | - | Italian | |
| Ileana | | - | Romanian, Spanish, Italian | |
| Imelda | | ee-MEL-dah | Italian, Spanish | |
| Imma | | - | Italian, Catalan | |
| Immacolata | | - | Italian | |
| Ines | | - | Italian, Slovene, Croatian | |
| Innocenzo | | - | Italian | |
| Iolanda | | - | Italian, Portuguese, Romanian | |
| Ippolito | | - | Italian | |
| 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 | |