| Harold | Irish | Introduced by the Anglo-Normans, Ha.. |  |  |
| Helen | Irish | A cognate of the Greek Helene, whic.. |  | |
| Hewney | Irish | Anglicized form of the Gaelic Uaith.. |  | |
| Hisolda | Irish | Irish variant of Iseult, a name of .. |  | |
| Hogan | Irish | Transferred use of the Anglicized s.. | | |
| Honor | Irish | A name introduced to Ireland by the.. | | |
| Hoyt | Irish | Meaning "mind" or "spirit."
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| Hugh | Irish | A borrowing from the English, Hugh .. | | |
| Hurley | Irish | Transferred use of the surname, whi.. | | |
| Ian | Irish | Irish form of Iain, the Scottish Ga.. | | |
| Iarfhlaith | Irish | Old name said to mean "tributary lo.. | | |
| Ide | Irish | Derived from the Old Irish itu (thi.. | | |
| Ina | Irish | Anglicized form of Aghna, the Irish.. | | |
| Inis | Irish | Gaelic form of Ennis, a borrowing o.. | | |
| Innis | Irish | Transferred use of the Scottish sur.. | | |
| Iomhar | Irish | Gaelic form of Ivor (bow warriors, .. | | |
| Ion | Irish | Irish Gaelic form of Ian, a cognate.. | | |
| Ionatan | Irish | Gaelic form of Jonathan (God has gi.. | | |
| Ioseph | Irish | Gaelic form of Joseph (may he add)... | | |
| Irene | Irish | A borrowing from the English, Irene.. | | |
| Isabel | Irish | Originated as a Spanish variant of .. | | |
| Iseult | Irish | Of debated origin and meaning. Iseu.. | | |
| Isibeal | Irish | Gaelic form of Isabel (God is my oa.. | | |
| Iuile | Irish | Gaelic form of Julia (downy-bearded.. | | |
| Ivor | Irish | Derived from the Old Norse Ivarr, a.. | | |
| James | Irish | A popular name in Ireland, James is.. | | |
| Jamie | Irish | A pet form of James (supplanting, s.. | | |
| Jan | Irish | Feminine form of John (God is graci.. | | |
| Jana | Irish | Feminine form of John (God is graci.. | | |
| Jane | Irish | A borrowing from the English, Jane .. | | |
| Janet | Irish | Diminutive form of Jane (God is gra.. | | |
| Jarlath | Irish | Anglicized form of larfhlaith, an o.. | | |
| Jason | Irish | A borrowing from the English, Jason.. | | |
| Jean | Irish | A borrowing from the English and th.. | | |
| Jilleen | Irish | Variant of Jillian meaning "pure .. | | |
