| Gable | 1 |
| Gaede | 1 |
| Gaffikin | 1 |
| Gage | 2 |
| Gagner | 1 |
| Gaines | 2 |
| Gainor | 1 |
| Gaither | 1 |
| Galarza | 1 |
| Galbreath | 1 |
| Gallahan | 2 |
| GallenKamp | 1 |
| Galloway | 1 |
| Gallucci | 2 |
| Galt | 8 |
| Galtney | 1 |
| Galvin | 2 |
| Gambill | 1 |
| Gamboll | 1 |
| Gambrell | 2 |
| Gammon | 1 |
| Gance | 1 |
| Gander | 1 |
| Gandy | 5 |
| Gann | 1 |
| Gant | 4 |
| Gardiner | 1 |
| Gardner | 3 |
| Garlach | 1 |
| Garlock | 1 |
| Garner | 3 |
| Garrard | 2 |
| Garrett | 22 |
| Garrison | 2 |
| Garvin | 5 |
| Gary | 2 |
| Gast | 1 |
| Gates | 3 |
| Gathings | 5 |
| Gatlin | 1 |
| Gay | 2 |
| Gayart | 1 |
| Gaylord | 1 |
| Gearhart | 4 |
| Gebhardt | 4 |
| Geddis | 1 |
| Geer | 1 |
| Gelinas | 2 |
| Gennings | 2 |
| Gentner | 1 |
| Gentry | 2 |
| Gentz | 3 |
| Genveo | 1 |
| George | 5 |
| Gerard | 1 |
| Gerber | 1 |
| Gerwin | 5 |
| Gettemy | 1 |
| Geurin | 1 |
| Gex | 1 |
| Gheen | 1 |
| Ghormley | 1 |
| Ghrigsby | 6 |
| Gibbons | 1 |
| Gibbs | 5 |
| Giblin | 2 |
| Gibson | 9 |
| Gifford | 2 |
| Giffs | 1 |
| Gilbert | 21 |
| Gilbreath | 2 |
| Gilchriest | 1 |
| Gilchrist | 2 |
| Giles | 2 |
| Gill | 8 |
| Gillette | 1 |
| Gilley | 2 |
| Gilliam | 3 |
| Gilliardi | 1 |
| Gillis | 2 |
| Gilman | 6 |
| Gilmore | 12 |
| Ginivan | 1 |
| Gino | 3 |
| Gipson | 1 |
| Gish | 1 |
| Gist | 1 |
| Givens | 2 |
| Gladdis | 1 |
| Glasco | 1 |
| Glasgow | 19 |
| Glass | 5 |
| Glasscock | 3 |
| Glaubke | 2 |
| Glaze | 3 |
| Glazebrook | 1 |
| Glendy | 9 |
| Glenn | 20 |
| Glover | 3 |
| Goad | 1 |
| Goading | 1 |
| Goates | 1 |
| Gobble | 1 |
| Goddard | 5 |
| Godsey | 1 |
| Goelzer | 1 |
| Goes | 1 |
| Gold | 2 |
| Goldbert | 1 |
| Golden | 3 |
| Goldenbogen | 1 |
| Goldston | 12 |
| Gollihue | 1 |
| Gomora | 1 |
| Gonsales | 1 |
| Gonterman | 1 |
| Gooch | 1 |
| Good | 1 |
| Goode | 2 |
| Goodell | 1 |
| Goodloe | 1 |
| Goodman | 2 |
| Goodrich | 5 |
| Goodson | 3 |
| Goodston | 1 |
| Gordon | 4 |
| Gore | 57 |
| Gormly | 1 |
| Gorny | 3 |
| Gorrell | 1 |
| Gorton | 1 |
| Goshorn | 1 |
| Goss | 5 |
| Gossett | 1 |
| Gough | 3 |
| Gould | 1 |
| Gouldman | 1 |
| Grace | 4 |
| Gradert | 1 |
| Grady | 1 |
| Grafton | 1 |
| Graham | 20 |
| Graichen | 1 |
| Grande | 1 |
| Grant | 5 |
| Granucci | 1 |
| Grass | 1 |
| Grasser | 1 |
| Graves | 1 |
| Gravy | 1 |
| Gray | 8 |
| Grayson | 26 |
| Grayvelle | 1 |
| Greagsby | 7 |
| Greeman | 1 |
| Green | 58 |
| Greenberg | 1 |
| Greene | 4 |
| Greening | 1 |
| Greenlee | 48 |
| Greenstreet | 1 |
| Greenway | 12 |
| Greenwell | 1 |
| Greenwood | 3 |
| Gregg | 4 |
| Gregoire | 1 |
| Gregory | 8 |
| Grice | 1 |
| Grier | 1 |
| Griffe | 1 |
| Griffin | 9 |
| Griffis | 2 |
| Griffith | 1 |
| Grigdesby | 3 |
| Grigsbey | 4 |
| Grigsby | 5505 |
| Grimes | 2 |
| Grimm | 1 |
| Grimmer | 1 |
| Grinstead | 10 |
| Grisette | 3 |
| Grisham | 1 |
| Grissom | 1 |
| Griswold | 1 |
| Groff | 1 |
| Grogan | 1 |
| Gross | 1 |
| Grove | 2 |
| Groves | 21 |
| Gruber | 1 |
| Grymes | 2 |
| Guerriero | 1 |
| Guesman | 1 |
| Guibert | 1 |
| Guinn | 1 |
| Gulasky | 1 |
| Gulley | 4 |
| Gump | 1 |
| Gunn | 3 |
| Gunnels | 1 |
| Gunsaules | 3 |
| Gupton | 1 |
| Gurley | 2 |
| Guthrie | 1 |
| Gutridge | 1 |
| Guymon | 3 |
| Gwin | 5 |
updated - GMB 06/16/07