| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 421 | Gleda | Welsh | Lame. | F | |
| 422 | Gleis | Welsh | Legendary son of Merin. | M | |
| 423 | Glenda | Welsh | Derived from a compound of words meaning holy and good. Famous bearer: British actress Glenda Jackson. | F | |
| 424 | Glenis | Welsh | Variant of Glenda. Fair, good, holy. | F | |
| 425 | Glenn | Welsh | Dwells in the glen. | M | |
| 426 | Glenys | Welsh | Variant of Glenda. Fair, good, holy. | F | |
| 427 | Glew | Welsh | Legendary son of Ysgawd. | M | |
| 428 | Glinda | Welsh | Fair; good. | F | |
| 429 | Glinyeu | Welsh | Legendary son of Taran. | M | |
| 430 | Glinys | Welsh | Little valley. | F | |
| 431 | Glyn | Welsh | Fair; good. | F | |
| 432 | Glyn | Welsh | Valley. | M | |
| 433 | Glynae | Welsh | Variant of Glenda. Fair; good. | F | |
| 434 | Glynda | Welsh | Fair; good. | F | |
| 435 | Glynis | Welsh | Little valley. Famous bearer: British twentieth century actress Glynis Johns. | F | |
| 436 | Glynn | Welsh | Fair; good. From the glenn. | F | |
| 437 | Glynnis | Welsh | Variant of Glenda. Fair; good. | F | |
| 438 | Gobrwy | Welsh | Legendary son of Echel Pierced Thighs. | M | |
| 439 | Goewin | Welsh | Legendary daughter of Pebin. | F | |
| 440 | Goleuddydd | Welsh | Bright day. | F | |