| N A M E | O R I G I N | M E A N I N G |
| Gruffen | Welsh | Fierce lord. |
| Gruffin | Welsh | Fierce lord. |
| Gruffudd | Welsh | Red haired. |
| Gruffyn | Welsh | Fierce lord. |
| Grufydd | Welsh | Red haired. |
| Gryphin | Welsh | Strong in faith. |
| Gryphon | Welsh | Fighting chief; fierce. The fierce Gryphon of Greek mythology and medieval legend was a creature with foreparts of an eagle and hindquarters of a lion. |
| Gualterio | Spanish | Spanish form of Walter 'strong warrior'. |
| Gualtiero | Italian | Italian form of Walter 'strong warrior'. |
| Guang | Chinese | Light |
| Guban | African | Burnt |
| Gudbrand | Norse | Weapon of the gods. |
| Gudbrande | Norse | Weapon of the gods. |
| Gudlaug | Norse | Son of Asbjorn. |
| Gudmund | Norse | A chieftain. |
| Guebers | Persian | Followers of ancient Persian religion. |
| Guffd | Indian | Serpent god. |
| Guglielmo | Italian | Resolute protector. |
| Guglilmo | Teutonic | Resolute guardian. |
| Guido | Italian | Forest Guide |
| Guifford | French | Chubby cheeks. |
| Guilbert | English | Trusted. |
| Guilerme | Teutonic | Resolute fighter. |
| Guilio | Greek | Young. |
| Guillame | Teutonic | Resolute fighter. |
| Guillaume | French | The French form of the name William, meaning resolute protector.. |
| Guillermo | Spanish | Form of WILLIAM |
| Guin | Gaelic | Blond. |
| Guiseppe | Hebrew | God will multiply. |
| Gulab | Indian | Rose. |
