| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Ingomar | - | German, Ancient Germanic | ||
| IngrÍ&Eth;R | - | Ancient Scandinavian | ||
| Ingram | ING-grəm | English | ||
| Ingulf | - | Ancient Germanic | ||
| Ingvildr | - | Ancient Scandinavian | ||
| Inigo | IN-i-go | English (Rare) | ||
| Ioachim | - | Judeo-Christian Legend | ||
| Ioakeim | - | Judeo-Christian Legend | ||
| Iodocus | - | Ancient Celtic (Latinized) | ||
| 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 | ||
| Iovianus | - | Ancient Roman | ||
| Iovita | - | Ancient Roman | ||
| IrÉNÉE | ee-re-NE | French |