| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Gilroy | - | Irish, Scottish | ||
| GobÁN | - | Irish | ||
| Gobinet | - | Irish | ||
| Gobnait | GAWB-net | Irish | ||
| Gobnet | - | Irish | ||
| Gofraidh | - | Irish | ||
| Goibniu | - | Irish Mythology | ||
| Gormflaith | - | Irish | ||
| Gormlaith | - | Irish, Scottish | ||
| GrÁInne | GRAWN-ya | Irish, Irish Mythology | ||
| GrÉAgÓIr | GRAY-gor | Irish | ||
| Grady | GRAY-dee | Irish, English | ||
| Grania | GRAWN-ya | Irish | ||
| Granya | - | Irish | ||
| Heber (1) | - | Irish |