| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 341 | Gwallter | Welsh | Welsh form of Walter 'strong fighter'. | M | |
| 342 | Gwarthegydd | Welsh | Legendary son of Caw. | M | |
| 343 | Gwawl | Welsh | Legendary son of Clud. | M | |
| 344 | Gwayne | Welsh | White hawk. Variant of the medieval name Gawain. | M | |
| 345 | Gweir | Welsh | Legendary son of Cadellin Silver. | M | |
| 346 | Gwendelyn | Welsh | Fair; blessed. | M | |
| 347 | Gwenwynwyn | Welsh | Legendary son of Naw. | M | |
| 348 | Gwern | Welsh | Old. | M | |
| 349 | Gwernach | Welsh | Dwells by the alder tree river. | M | |
| 350 | Gwevyl | Welsh | Legendary son of Gwastad. | M | |
| 351 | Gwilenhin | Welsh | Legendary king of France. | M | |
| 352 | Gwilym | Welsh | A Welsh variant of William, meaning resolute protector. | M | |
| 353 | Gwitart | Welsh | Legendary son of Aedd. | M | |
| 354 | Gwrddywal | Welsh | Legendary son of Evrei. | M | |
| 355 | Gwres | Welsh | Legendary son of Rheged. | M | |
| 356 | Gwyddawg | Welsh | Legendary son of Menestyr. | M | |
| 357 | Gwydre | Welsh | Legendary son of Arthur. | M | |
| 358 | Gwydyon | Welsh | Legendary son of Don. | M | |
| 359 | Gwylim | Welsh | A Welsh variant of William, meaning resolute protector. | M | |
| 360 | Gwyn | Welsh | White or handsome. | M | |