Variant spellings are included, so there may be some duplication. If you know of something that should be included, please let me know
| Gaffeny Cavan |
| Gaffney Cavan |
| Gafney Cavan |
| Gahan Australia |
| Gahen Australia |
| Gahen Belmullet, Co. Mayo |
| Galager Minnesota/Montana |
| Galager |
| Galagher Minnesota/Montana |
| Galagher |
| Galaher Minnesota/Montana |
| Galaher |
| Gallagheer Minnesota/Montana |
| Gallagheer |
| Gallagher Minnesota/Montana |
| Gallagher |
| Gallaher Minnesota/Montana |
| Gallaher |
| Galliher Minnesota/Montana |
| Galliher |
| Gannan Dunleer, Co. Louth |
| Gannion Dunleer, Co. Louth |
| Gannon Dunleer, Co. Louth |
| Gara |
| Garety |
| Garretty |
| Garrity |
| Garvey |
| Garvey |
| Garvey Roscommon |
| Garvey |
| Garvie |
| Garvie |
| Garvie Roscommon |
| Garvie |
| Garvy |
| Garvy |
| Garvy Roscommon |
| Garvy |
| Gaugh |
| Gaugh (archived) |
| Gaugh |
| Gaugh |
| Gaughan Belmullet, Co. Mayo |
| Gavney Cavan |
| Geagan |
| Geaghan |
| Gegan |
| Geoghagan |
| Geoghan |
| Geoghegan |
| Geraghty Headford/ Dakota county, Minn. |
| Geraghty |
| Geraghty |
| Gerarty Headford/ Dakota county, Minn. |
| Gerarty |
| Gerarty |
| Geratty Headford/ Dakota county, Minn. |
| Geratty |
| Geratty |
| Geraty Headford/ Dakota county, Minn. |
| Geraty |
| Geraty |
| Gerety Headford/ Dakota county, Minn. |
| Gerety |
| Gerety |
| Gerraghty Headford/ Dakota county, Minn. |
| Gerraghty |
| Gerraghty |
| Gerratty Headford/ Dakota county, Minn. |
| Gerratty |
| Gerratty |
| Gerraty Headford/ Dakota county, Minn. |
| Gerraty |
| Gerraty |
| Gerrety Headford/ Dakota county, Minn. |
| Gerrety |
| Gerrety |
| Gerrity Headford/ Dakota county, Minn. |
| Gerrity |
| Gerrity |
| Gerty Headford/ Dakota county, Minn. |
| Gerty |
| Gerty |
| Ghee Cavan |
| Ghee |
| Ghee |
| Gibbin |
| Gibbing |
| Gibbings |
| Gibbins |
| Gibbions |
| Gibblin |
| Gibbon |
| Gibbons |
| Giblan |
| Giblin |
| Gibling |
| Giblon |
| Gibney (archived) |
| Giffney |
| Gilheaney McIlhaney |
| Giligan . |
| Gillagan . |
| Gillagen . |
| Gillgan . |
| Gilligan . |
| Gillycuddy |
| Gillycuddy (archived) |
| Gillycuddy (archived) |
| Gillycuddy |
| Gillycuddy |
| Gillycuddy Macroom area, Co. Cork; and Glynn, Mourneabbey, Co. Cork |
| Gillycuddy |
| Ginn |
| Ginna |
| Ginna (archived) |
| Girey |
| Gissane |
| Givney |
| Gleason Gowran, Kilkenny/Australia |
| Gleeson Gowran, Kilkenny/Australia |
| Glenane |
| Glenanne |
| Glennan |
| Glennane |
| Glennin |
| Glenning |
| Glennon |
| Glesson Gowran, Kilkenny/Australia |
| Glin Moylough, Co. Galway/ Canada |
| Glinn Moylough, Co. Galway/ Canada |
| Glissane Gowran, Kilkenny/Australia |
| Glisson Gowran, Kilkenny/Australia |
| Glyn Moylough, Co. Galway/ Canada |
| Glynn Moylough, Co. Galway/ Canada |
| Glynne Moylough, Co. Galway/ Canada |
| Goaley |
| Goch |
| Goch (archived) |
| Goch |
| Goch |
| Goff |
| Goff (archived) |
| Goff |
| Goff |
| Goligher Minnesota/Montana |
| Goligher |
| Gooley |
| Goonan |
| Goonane |
| Gordan Kilgarriff, Fairymount (Tibohine), Co. Roscommon |
| Gorden Kilgarriff, Fairymount (Tibohine), Co. Roscommon |
| Gordon Kilgarriff, Fairymount (Tibohine), Co. Roscommon |
| Gorman |
| Gormican |
| Gormon |
| Gough |
| Gough (archived) |
| Gough |
| Gough |
| Goveran |
| Goveran (archived) |
| Goveran |
| Govern |
| Govern (archived) |
| Govern |
| Gracey Armagh |
| Gracie Armagh |
| Gracy Armagh |
| Graddy Clare |
| Gradey Clare |
| Grady Clare |
| Grannell |
| Gray |
| Gray Kilkenny |
| Gready Clare |
| Greave Tyrone/ Australia |
| Greaves Tyrone/ Australia |
| Greenan |
| Greer Armagh, Down |
| Greeve Tyrone/ Australia |
| Greeves Tyrone/ Australia |
| Greg |
| Gregg |
| Greig |
| Grey |
| Grey Kilkenny |
| Grier Armagh, Down |
| Grieve Tyrone/ Australia |
| Grieves Tyrone/ Australia |
| Guillagan . |
| Guillagen . |
| Guiness |
| Guiness (archived) |
| Guinna |
| Guinna (archived) |
| Guinnes |
| Guinnes (archived) |
| Guinness |
| Guinness (archived) |
| Gulligan . |
| Gully |