| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Iacchus | - | Greek Mythology (Latinized) | ||
| Iachin | - | Biblical Latin, Biblical Greek | ||
| Iael | - | Biblical Greek | ||
| Iair | - | Biblical Latin, Biblical Greek | ||
| Iairos | - | Biblical Greek | ||
| Iakobos | - | Biblical Greek | ||
| Ianthe | - | Greek Mythology | ||
| Iapetos | - | Greek Mythology | ||
| Iapetus | - | Greek Mythology (Latinized) | ||
| Iapheth | - | Biblical Greek | ||
| Iared | - | Biblical Latin, Biblical Greek | ||
| Iason | - | Greek Mythology, Ancient Greek, Greek, Biblical Greek, Biblical Latin | ||
| Icarus | IK-ə-rəs (English) | Greek Mythology (Latinized) | ||
| Iedida | - | Biblical Greek | ||
| Iephthae | - | Biblical Greek |