| Hydd | A name meaning a hidden valley. |
| Hywel | A name meaning eminent or notable. |
| Iau | Welsh form of Zeus 'life'. |
| Ida | Active; Diligent. A Greek mythological nymph who cared for the infant Zeus on Mt. Ida.; Hardworking; A king; A nymph.; Name of a king; Name of a mountain.; Norman Origin Diligent; One who is diligent; hardworking; in mythology, the nymph who cared for Zeu |
| Iddawg | Legendary son of Mynyo. |
| Iddig | Legendary son of Anarawd. |
| Idella | A name meaning industrious woman. |
| Idris | An eager lord; Fiery; Fiery Lord; A Prophets name. |
| Iffat | Variant of Iffat: Virtue. Chastity. |
| IFOR | Of uncertain origin, possibly meaning "lord."Often associated with Norse/Scandinavian Ivor, "bowman". IOAN, IWAN |
| Ikram | Esteem Veneration.; Honor. Hospitality. Generosity. |
| Ilar | Derived from the Latin word for cheerful. |
| Ilham | Intuition. Inspiration. |
| Imaan | Variant of Iman: Faith. Belief. |
| Iman | Faith; Faith. Belief.; Having great faith; Name of raga |
| Imani | Faith (one of the seven principles of Kwanzaa); Trustworthy |
| Inas | Capable; Sociability. |
| Indeg | Legendary daughter of GanKy. |
| Inderpreet | Love for the heavens. |
| Indi | Independent and free soul |
| Indira | Bestower of wealth; God Of Heaven & Thunderstorms; Goddess Lakshmi; Lakshmi; The mythological wife of Vishnu.; Splendid. |
| Iob | Diminutive of Iorwerth: Worthy lord. Derived from 'ior' and 'gwerth'. Legendary son of Maredudd. |
| Iolo | Diminutive of Iorwerth: worthy lord. |
| 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 |
| Iorwen | Lord, beautiful |
| IORWERTH | handsome lord; son of Maredudd in legend. |
| Iram | The effusion of them, a high heap.; Heaven. Garden.; Shining |
| 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. |
| Iris | Colorful, Rainbow; Diminutive of Beatrice F: A variant of Beatrix meaning bringer of joy. In the Divine Comedy, Beatrice was Dante's guide through Paradise, perhaps inspired by Beatrice Portinari who was Dante's earliest love.; Flower; Rainbow; Rainbow go |
| Isha | Lord.; One who protects; The protector / a lively woman; Woman |
| Ishani | Goddess Parvati; Goddess Durga; Lady.; Parvati, wife of Lord Shiva |
| Ishrat | A word meaning joy or delight. |
| Ithel | A name meaning bountiful gift. |
| IUSTIG | legend name (son of Caw) KAY |
| Ivy | A creeper; Ivy; Resembling the evergreen vining plant; A Vine |
| Iwan | Welsh form of John 'God's gift'. |
| Izabelle | One who is devoted to the divine. |
| Jabeen | Refers to a noble forehead. |
| Jai | Conqueror; Hild; Victorious.; Variant of names like Jason and Jacob. |
| Jaimini | An ancient philosopher |