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| Gabel | |
| Gable | |
| Gade | |
| Gaenisch | |
| Gage | |
| Galep | |
| Galke | |
| Gallentin | |
| Gallner | |
| Gamdin | |
| Gandritz | |
| Ganger | |
| Gangler | See also Gengler |
| Garbe | |
| Garbusch | |
| Garde | |
| Garigan | |
| Garkins | |
| Gaulke | |
| Gaus | |
| Gebel | |
| Gebhard | |
| Gehms | |
| Gehringe | |
| Geidel | |
| Geier | |
| Geiger | |
| Geilfus | |
| Geilpus | |
| Geise | |
| Geisler | |
| Geitel | |
| Gelzer | |
| Gemeinhart | |
| Genden | |
| Gengler | See also Gangler |
| Genrich | |
| Gens | |
| George | |
| Gerardi | |
| Gerbe | |
| Gerber | |
| Gerbing | |
| Gerboth | |
| Gerhardt | |
| Gerier | |
| Gerlach | |
| Gersegner | |
| Gerthe | |
| Gertmann | |
| Gertz | |
| Gesse | |
| Getch | |
| Getta Scollard | |
| Gettman | |
| Geyer | |
| Gieger | |
| Gierach | May be interchangeable with Gieratz. |
| Gieratz | |
| Gierke | |
| Giese | |
| Giess | |
| Giffie | |
| Gifford | |
| Gilbert | |
| Gilliga | |
| Gilow | |
| Gingler | See also Gengler |
| Gipfel | |
| Girach | |
| Gise | |
| Gittel | |
| Glaessner | Glaesssner, Gläsner and Glassner may all be interchangeable. |
| Gläser | |
| Gläsner | See also Glaessner |
| Glass | |
| Glassner | |
| Gleisberg | |
| Gleissberg | |
| Gneuky | |
| Gobel | |
| Gobrecht | |
| Gocke | |
| Goedecke | |
| Goellner | |
| Goerbing | |
| Goertz | |
| Goes | |
| Goetke | |
| Goettke | |
| Goetz | |
| Goldner | |
| Golling | |
| Golner | |
| Goltemann | |
| Good | See also Gude |
| Goodwalt | |
| Goran | |
| Gordon | |
| Gorseigner | |
| Götsch | |
| Gotter | |
| Gottermann | |
| Göttke | |
| Gottschalg | |
| Gottschalk | |
| Gough | |
| Graag | |
| Grabner | |
| Grabowsky | |
| Grack | |
| Grade | See also Grady |
| Gradin | |
| Grady | See also Grade |
| Graff | |
| Grain | |
| Gralte | |
| Grams | |
| Grant | |
| Grantz | |
| Graph | |
| Graser | |
| Grasselt | |
| Grassle | |
| Gratochill | |
| Gray | |
| Graz | |
| Green | See also Grün |
| Gregg | |
| Gregorius | |
| Grenmy | |
| Gres | |
| Gress | |
| Gretz | |
| Greunewald | See also Gruenewald |
| Griarsohn | |
| Gribben | |
| Griebenan | |
| Grien | |
| Grienan | |
| Grimett | |
| Grimm | |
| Grismaier | |
| Grob | |
| Grobb | |
| Grobe | |
| Grober | |
| Groley | |
| Groll | |
| Grootemate | |
| Grosch | |
| Grosh | |
| Gross | |
| Grosskopf | |
| Grossman | |
| Grossmann | |
| Grotemaat | |
| Groth | |
| Grubben | |
| Grubel | |
| Gruel | |
| Gruen | |
| Gruenberg | |
| Gruenewald | Grüwald, Gruenwald and Gruenwaldt are probably interchangeable with Gruenewald. See also Greunewald |
| Gruenwald | |
| Gruenwaldt | |
| Grün | See also Green |
| Grünewald | Grüwald, Gruenwald and Gruenwaldt are probably interchangeable with Gruenewald. |
| Grunod | |
| Grüwald | Grüwald, Gruenwald and Gruenwaldt are probably interchangeable with Gruenewald. |
| Guchler | |
| Gude | See also Good |
| Gudinger | |
| Guenther | |
| Guentherberg | |
| Guettch | |
| Guettler | |
| Guidinger | |
| Gunter | |
| Gunther | |
| Guntner | |
| Gurn | |
| Gurnee | |