- Gabet
- Gable
- Gabriel
- Gadson
- Gaff
- Gage
- Gager
- Gagnon
- Galanty
- Galentine
- Gallaway
- Galliher
- Gallinger
- Gallmeier
- Gallmeyer
- Galloway
- Gambrell
- Gandolfo
- Gandy
- Gannon
- Gansemer
- Garcia
- Gard
- Gardiner
- Gardner
- Garman
- Garner
- Garr
- Garringer
- Garver
- Garvin
- Gary
- Gasdorf
- Gaskill
- Gast
- Gaston
- Gatchell
- Gates
- Gaudette
- Gaughan
- Gause
- Gay
- Gayer
- Gaylord
- Gaze
- Gearhart
- Geary
- Gebhard
- Gebhart
- Geddis
- Geib
- Geiger
- Geimer
- Geise
- Geiselman
- Geller
- Gennette
- Gensheimer
- Gentile
- George
- Georgi
- Gepfert
- Gerard
- Gerardot
- Gerber
- Gerbers
- Gerding
- Gerhardstein
- Gerig
- Gerke
- Gerken
- Germain
- German
- Gernhardt
- Geroff
- Gerra
- Gervais
- Gessner
- Getts
- Getty
- Getz
- Gevers
- Geyer
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- Giant
- Gibbons
- Gibbs
- Gibson
- Gick
- Gidley
- Giere
- Giese
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- Gilb
- Gilbert
- Giles
- Gill
- Gillen
- Gillenwater
- Gillespie
- Gillie
- Gillig
- Gilliom
- Gillman
- Gilmore
- Gilson
- Ginder
- Ging
- Gingrich
- Ginther
- Gipson
- Girard
- Girardot
- Girn
- Giron
- Glackin
- Gladieux
- Glant
- Glaser
- Glasper
- Glass
- Glassley
- Glenn
- Glentzer
- Glick
- Glidewell
- Glover
- Gloyd
- Gnagy
- Gnau
- Goad
- Gochenaur
- Gochenour
- Godfrey
- Godwin
- Goebel
- Goeglein
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- Goes
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- Goldthwaite
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- Gomez
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- Goneau
- Goodland
- Goodman
- Goodrich
- Goodwin
- Gordon
- Gorka
- Gorney
- Gorrell
- Gortrian
- Gosheff
- Goshert
- Goshorn
- Goss
- Gossett
- Gotsch
- Gotschall
- Gottfried
- Gough
- Gould
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- Grabill
- Grable
- Grabner
- Grabowski
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- Granahan
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- Grandison
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- Graves
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- Greenberg
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- Gregory
- Greim
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- Griffiths
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- Grimme
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- Guse
- Gust
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- Gustin
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- Guthrie
- Gutting
- Guyll
- Guzik