| Gilchrist | Irish | Anglicized form of the Irish Giolla.. |  |  |
| Gildea | Irish | Anglicized form of Giolla Dhe (serv.. |  | |
| Gilibeirt | Irish | Gaelic form of Gilbert (famous pled.. | | |
| Gill | Irish | Anglicized form of Giolla (servant).. | | |
| Gillean | Irish | Meaning "servant of Saint John." It.. | | |
| Gillespie | Irish | Anglicized form of Giolla Easpuig (.. | | |
| Gilley | Irish | Pet form of various names beginning.. | | |
| Gillian | Irish | Feminine form of Julian, which is.. |  | |
| Gilmore | Irish | Transferred use of the Anglicized s.. | | |
| Gilroy | Irish | Meaning "servant to the king." | | |
| Giolla | Irish | Easpuig Combination name composed o.. | | |
| Giolla | Irish | Easpuig Combination name composed o.. | | |
| Giolla-Dhe | Irish | Combination name composed of the na.. | | |
| Girvin | Irish | Meaning "small and tough."
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| Glaisne | Irish | Old name of uncertain derivation, c.. | | |
| Glenn | Irish | Derived from the Gaelic gleann (mou.. | | |
| Glenna | Irish | Meaning "valley; glen." A feminine .. | | |
| Gloria | Irish | Derived from the Latin gloria (glor.. | | |
| Glynis | Irish | Meaning "valley." Among the notable.. | | |
| Gobinet | Irish | Irish variant of the Gaelic Gobnait.. | | |
| Gobnait | Irish | Gaelic name derived from gob (a mou.. | | |
| Gobnata | Irish | Latinate form of Gobnat, an Irish v.. | | |
| Godfrey | Irish | From the Old French Godefrei, which.. | | |
| Gofraidh | Irish | Irish form of the Old Norse Guthfri.. | | |
| Gordon | Irish | Transferred use of the Scottish sur.. | | |
| Gorman | Irish | Meaning "small and blue eyed."
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| Grace | Irish | A borrowing from the English, Grace.. | | |
| Grady | Irish | Transferred use of the surname, whi.. |  | |
| Grainne | Irish | Old name meaning "grain-goddess." G.. | | |
| Grania | Irish | Latinate form of Grainne (grain-god.. | | |
| Greagoir | Irish | Gaelic form of Gregory (vigilant, w.. | | |
| Gregory | Irish | Introduced to Ireland by the Anglo-.. | | |
| Guy | Irish | A borrowing from the French, Guy is.. | | |
| Hagen | Irish | Meaning "youthful."
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| Haley | Irish | Meaning "ingenious." The actor Hale.. | | |
