| Grayham | Dweller at the gravelly home. |
| Grayheme | One from the gray homestead. |
| Grayley | Combination of gray and ley, meaning 'meadow' or 'clearing' |
| Graziano | Italian surname, meaning 'from the town of Graziano' |
| Greenberry | Combination of green and berry, symbolizing nature and growth |
| Greffen | One who is a bold, brave hero. |
| Greggy | A name meaning a watchful soul. |
| Grell | Short form of Gregory, meaning 'watchful' or 'alert' |
| Gretah | A variant meaning a precious pearl. |
| Gretch | A short form meaning a small pearl. |
| Gretchin | A diminutive form of Margaret. |
| Gretchun | A variant of the name Margaret. |
| Grethyn | A unique variation of the name. |
| Gretie | A sweet diminutive of Margaret. |
| Gretson | English surname, meaning 'son of Gregory' |
| Greysen | Combination of gray and sen, meaning 'old' or 'wise' |
| Grifin | Red, ruddy, prince |
| Grimmwolf | Combination of Grimm and wolf, symbolizing strength and ferocity |
| Grissom | English surname, meaning 'son of Gregory' |
| Gritt | Short form of Gritton, meaning 'strong' or 'resilient' |
| Gronia | A woman of the gray island. |
| Grozdan | Slavic name, meaning 'gift of God' |
| Grubbs | English surname, meaning 'son of Gregory' |
| Gruff | Welsh name, meaning 'strong' or 'firm' |
| Gryffin | Red, ruddy, prince |
| Grytta | A name meaning a small grey stone. |
| Gudmundur | Icelandic name, meaning 'guardian of the mighty' |
| Gudval | Icelandic name, meaning 'good protection' |
| Guilem | Strong guardian |
| Guilianna | Youthful and full of energy. |
| Guirec | Breton name, meaning 'little lord' |
| Guiseppa | God will increase her bounty. |
| Gundula | Fight secret, magic |
| Gunthild | A maiden who fights in battle. |
| Gur Baal | The governors whelp |
| Gurgen | Armenian name, meaning 'young warrior' |
| Gursagar | Punjabi name, meaning 'guru' or 'teacher' |
| Gusepe | God will increase or add more |
| Gustas | Lithuanian name, meaning 'strong' or 'powerful' |
| Gustey | A person of staff or strength |