- Gadd (continued)
- Gaddes
- Gadsby
- Gadsden
- Gael
- Gaffaney
- Gage
- Gagon
- Gair
- Gait-Smith
- Galbraith
- Gale
- Galea
- Galeazzi
- Galinsky
- Galitzine
- Gallagher
- Gallard
- Galley
- Galliard
- Gallop
- Galloway
- Galpin
- Galt
- Galton-Fenzi
- Gamblen
- Gamlin
- Gammie
- Gammon
- Gander
- Gane
- Gange
- Gangl
- Gannaway