| IGNATIUS | Latin name meaning fiery one. |
| IGORR | A variant of Igor, meaning warrior. |
| Iiithya | goddess of woman in labor |
| Ilay | A name meaning the tree or branch. |
| Ileana | Light; Trojan; Shining; Brilliant; Variant of Helen; Torch of Light |
| ILITHYA | The goddess of childbirth and labor. |
| Ilon | A name meaning tree or oak. |
| ILONA | A name meaning bright light. |
| Ilonka | A name meaning shining one. |
| Ilu | A name meaning beautiful one. |
| Iluska | A name meaning bright star. |
| Ina | Lord Surya; In mythology, a moon goddess; Mother; Nickname dirived from suffix of many names.; Pure |
| INACHUS | myth name (a river god) |
| INESA | king, innocent |
| Inese | Kind or innocent. |
| INO | myth name (daughter of Cadmus) |
| Ioanna | A Greek name meaning God is gracious. |
| IOBATES | A name meaning one who goes to battle. |
| IOLA | myth name (sister of Iphitus) |
| Iolantha | A name meaning a violet flower bloom. |
| IOLANTHE | A name meaning a violet flower bloom. |
| Iole | Sister of Iphitus. |
| ION | myth name (son of Apollo) |
| Iona | From the king's island; Legendary king of France.; Purple Jewel; Purple gem; Violet.; Violet, from the Greek word 'ion'. Amethyst.; Woman from the island |
| Ionessa | A variant of the name Joanna. |
| Ionia | From the ancient Greek region. |
| Iora | Derived from the word for light. |
| Iorgas | A Greek variant of the name George. |
| IPHEGENIA | myth name (daughter sacrificed by Agamemnon) |
| Iphides | Hercules' twin brother. |
| Iphigenia | Mythological creature |
| IPHIS | myth name (hanged himself over unrequited love) |
| IPHITUS | myth name (brother of Iole) |
| Irayna | Peace. Greek goddess of peace. |
| Iren | A name meaning peace and harmony. |
| IRENA | A name meaning peace or calm. |
| Irene | Eace; Peace; Peaceful; A peaceful woman; in mythology, the goddess of peace; Peace. An early Christian martyr, and later borne by several Byzantine empresses. |
| Iriana | Peace. Greek goddess of peace. |
| Irini | A Greek name meaning harmony. |
| Irinia | One who embodies great peace. |