Meanings of Names
I
| Name | Other variations | Origin | Meaning |
| Iain | Ian, John | Gaelic | See John |
| Ianthe | Greek | Violet flower | |
| Ida | Teutonic | Happy | |
| Ifan | John | Welsh | See John |
| Ifor | Ivor | Welsh | See Ivor |
| Ignatius | Greek | Ardent, Fiery | |
| Igor | Russian | Alertness | |
| Imogen | Old Irish | Daughter | |
| Ines | Agnes, Inez | Spanish | Chaste, Pure |
| Ingram | Teutonic | A raven | |
| Inigo | Greek | Possibly from Ignatius | |
| Ira | Hebrew | Vigilant | |
| Irene | Eirene | Greek | Peace |
| Iris | Greek | Rainbow | |
| Irmentrude | See Ermyntrude | Teutonic | Strength of Remin (a god) |
| Isaac | Izaac, Ike | Hebrew | Laughter |
| Isabella | Bella, Belle, Ella, Isabel, Isobel | Hebrew | Worshipper of god |
| Ishbel | Ishbelle | Scottish | See Isabella |
| Isidore | Greek | Gift of Isis | |
| Ismay | Old Irish | Source unknown | |
| Isolde | Isold, Isolt, Iseult | French | From Arthurian legend, the beloved of Tristram |
| Israel | Hebrew | God prevails | |
| Ivan | See John | Russin | Jehovah has favoured |
| Ivor | Ifo, Ifor | Celtic | A Yew tree |
| Ivy | Old English | From the name of the plant |
