| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 481 | Giles | Gaelic | Servant. Famous bearer: the sixth century hermit St Giles was patron saint of cripples and beggars. | M | |
| 482 | Gille | Gaelic | Eathain - Gaelic form of Gillian. | M | |
| 483 | Gillean | Gaelic | A Scottish Gaelic name meaning St. John's servant. | M | |
| 484 | Gilleasbuig | Gaelic | Sacred and bold. | M | |
| 485 | Gillian | Gaelic | A Scottish Gaelic name meaning St. John's servant. | M | |
| 486 | Gilmore | Gaelic | Devoted. | M | |
| 487 | Gilroy | Gaelic | Serves the red-haired one, or ervant of the man with red hair. Both as a surname and given name. | M | |
| 488 | GioIlamhuire | Gaelic | Devoted. | M | |
| 489 | Giollanaebhin | Gaelic | Worships the saints. | M | |
| 490 | Giollaruaidh | Gaelic | Serves the red haired one. | M | |
| 491 | Gionnan | Gaelic | Fair skinned. | M | |
| 492 | Giorsal | Gaelic | Gaelic form of Grizel. | F | |
| 493 | Girven | Gaelic | Rough. | M | |
| 494 | Girvyn | Gaelic | Rough. | M | |
| 495 | Gleann | Gaelic | From the glen. | M | |
| 496 | Glen | Gaelic | From the glen. Valley. | F | |
| 497 | Glen | Gaelic | Derived from the Gaelic 'gleana', meaning valley. Used both as a surname and given name. Famous bearer: American singer Glen Campbell. | M | |
| 498 | Glendale | Gaelic | Valley. | M | |
| 499 | Glendon | Gaelic | From the dark glen. | M | |
| 500 | Glendyn | Gaelic | Valley. | M | |