| NAME | TIME FRAME | LOCATION | ADDRESS |
| Abbott | 1840 - Present | VT, WI | John Gamerdinger |
| Ackermann | 1800 - 1920 | GER, WI | Betty Andrews Storey |
| Ackermann | 1863 - Present | GER, OH | Frances Ackermann |
| Adams | 1650 - Present | ENG, CAN | Margaret Kurzynski |
| Adams | 1755 - Present | Devonshire, ENG | Tom Keyes |
| Alexander | 1800 - Present | IRE, ENG, NY, CT | Lowell Alexander |
| Alexander | 1830 - Present | SCOT, CAN, OH, WI | Susan Lind |
| Allmann | 1820 - 1935 | GER, NY, WI | Russell R. Retzack |
| Andrews | 1620 - Present | ENG, Essex Co., MA | Betty Andrews Storey |
| Arndt | 1850 - Present | IL, WI | Steve Arndt |
| Arnold | 1800 - 1900 | OH, IN | Richard O'Connor |
| Arthurs | 1757 - 1841 | PA | Laurel Ingram |
| Aschoff | 1850 - 1950 | SD | James Muhlenhaupt |
| Augustyn | 1820 - 1867 | Galicia, SPN | John Cieslewicz |
| Auth | 1750 - Present | GER, USA | Marge Wilmes |
| Bain | 1650 - Present | SCOT, MI, WI | Margaret Kurzynski |
| Baker | 1700 - 1900 | MD, MA | Cindy Schofield |
| Baldwin | 1600 - Present | ENG, NY, WI | Mary Ellen Timm |
| Ball | 1820 - Present | IRE, MA, WI | Maureen Schulz |
| Ballard | 1805 - 1875 | CT, WI | Art Clark |
| Banach | 1879 - Present | POL, WI | Frances Peg Mandery Hart |
| Bandhauer | 1790 - 1878 | GER | Mildred L. Traver |
| Baranowski | 1860 - 1920 | Poznan, POL, WI | Earl Komassa |
| Barber | 1700 - 1794 | ENG | Louis E. Perry |
| Bates | 1900 - Present | ENG, WI, IL | Ken Graham |
| Beard | 1650 - 1775 | ENG | Louis E. Perry |
| Beaumont | 1700 - Present | Huddersfield ENG, WI | Roy Fritz |
| Beck | 1836 - 1900 | OH | Jean Brisk |
| Bedus | 1800 - 1875 | Galicia, SPN | John Cieslewicz |
| Begauke | 1821 - 1878 | GER, MN | Roger Cobb |
| Beierle | 1850 - Present | WI | Al Koester |
| Bell | 1860 - 1981 | IA, WI, CA, HI | John Zwiebel |
| Bell | 1675 - 1751 | IRE, PA | Laurel Ingram |
| Bender | 1790 - 1875 | NY, WI | Guy Porth |
| Benedict | 1800 - Present | NY | Steve Arndt |
| Benton | 1780 - Present | NY, MI, MO | Fred Riley |
| Bentzler | 1804 - 1850 | GER, WI | Richard Bentzler |
| Berdelman | 1734 - Present | GER, IN, WI | Karyl F. Hahn |
| Bergstrom | 1868 - Present | SWED, WI | Susan Lind |
| Bernstein | 1800 - 1980 | POL, RUS, NY | Edwin Goldman |
| Betagh | 1650 - Present | IRE, MA, WI | Cindy Schofield |
| Bevsek | 1800 - Present | YUG, Austria, USA | Steve Gulgowski |
| Bielmann | 1761 - 1785 | GER | Karen Ann Johnson |
| Billam | 1700-1900 | PA, OH, IN | Annette Eliason |
| Bion | 1850 - 1870 | GER, WI | Frances Peg Mandery Hart |
| Bird | 1780 - 1860 | VA, WV, IN | Patricia Hewitt |
| Blanck | 1833 - 1880 | GER, WI | Barbara Eschenbauch |
| Blawat | 1796 - 1902 | Poland, WI | Deloris Cieslewicz |
| Blawat | 1800 - Present | POL, WI | Eileen Winger |
| Blievernicht | 1850 - Present | GER, WI | Jeanette Ragner |
| Bluem | 1850 - Present | WI | Ronald O. Worm |
| Bluemke | 1823 - 1895 | GER, WI | Howard Gennrich |
| Blum | 1731 - 1814 | Rheinpfalz, GER, NJ | Laurel Ingram |
| Bobinchak | 1840 - Present | Slovenia, NY, OH | Frances Ackermann |
| Boeker | 1800 - Present | WI | Ronald O. Worm |
| Boos | 1850 - Present | GER, WI | Jeanette Ragner |
| Booth | 1800 - Present | ENG, CAN, WI | Nancy Roloff |
| Borchers | 1812 - 1941 | GER, WI | Bev Good |
| Borkowski | 1850 - 1925 | POL, WI | Len Borkowski |
| Bose | 1830 - 1860 | GER, WI | Richard Bentzler |
| Bournique | 1600 - 1872 | Abreschviller, Moselle, FR | Maura Bournique |
| Bournique | 1872 - 1900 | Belgium | Maura Bournique |
| Bournique | 1880 - Present | IN, PA, OH | Maura Bournique |
| Boyle | 1863 - 1925 | WI | Leo Costello |
| Braden | 1700 - Present | IRE, WI | Jim Braden |
| Bradford | 1899 - Present | ENG, CAN, MI | Nancy Setlock |
| Brady | 1797 - 1880 | IRE, NY, WI, IL | Janice Burton |
| Branney | 1820 - Present | ENG, Co. Down IRE, CO | Roy Fritz |
| Braun | 1880 - Present | WI | Maureen Schulz |
| Breska | 1803 - 1850 | Poland | Deloris Cieslewicz |
| Breu | 1800 - 1900 | Nefair, GER | Al Koester |
| Briggs | 1750 - 1900 | ENG, WI | Roy Fritz |
| Brisach | 1810 - 1932 | Alsace, IL | Janice Burton |
| Brodersen | 1850 - Present | DEN, IA | Jan Pientok |
| Brooks | 1784 - Present | NJ, PA, OH, WI | John Gamerdinger |
| Brooks | 1810 - 1940 | ENG, MA, CT, WI | Russell R. Retzack |
| Brown | 1800 - 1830 | Palmyra, NY | Guy Porth |
| Brown | 1800 - 1900 | IRE, CAN, Rochester, NY | Joan Borman |
| Brown | 1797 - Present | NY, WI, DAK TERR | Karyl F. Hahn |
| Browne | 1817 - 1860 | PA, MS | Pauline Linoner |
| Brzezinski | 1862 - 1931 | Poland, PA, IN | John Cieslewicz |
| Brzoskowski | 1800 - Present | West Prussia, GER, USA | Steve Gulgowski |
| Buehler | 1756 - 1912 | GER, WI | Karen Ann Johnson |
| Bunnell | 1620 - 1890 | CT, New Brunswick | Betty Andrews Storey |
| Burgess | 1630 - 1895 | ENG, MA, RI, CT, NY, WI | Bob Heck |
| Burkley | 1650 - Present | GER, USA | Marge Wilmes |
| Burnham | 1620 - 1906 | ENG, Essex Co., MA | Betty Andrews Storey |
| Burns | 1800 - Present | IRE, NY | Steve Arndt |
| Burns | 1755 - Present | IRE | Tom Keyes |
| Burton | 1750 - 1926 | NC, KY, OH, IN, IL | Janice Burton |
| Bushanich | 1840 - Present | Slovenia | Frances Ackermann |
| Butcher | 1823 - 1847 | VA, OH, IN, WI | Frances Peg Mandery Hart |
| Butler | 1800 - 1920 | NY, MI | Carolyn M. Nelson |
| Cain | 1600 - Present | IRE, WI | Mary Swessel |
| Camery | 1791 - Present | VA, OH, IL, IA | Jan Pientok |
| Cappon | 1860 - 1980 | WI, KY, VA, IL | Wesley & Jane Hellen |
| Carlow | 1750 - 1900 | MA | Cindy Schofield |
| Carlson | 1842 - Present | SWE, WI | Judy Newman |
| Carr | 1850 - Present | IL | Ken Graham |
| Case | 1795 - 1973 | RI, MA, NY, WI, IA, NE, KS | Karyl F. Hahn |
| Case | 1795 - Present | MA, RI, NY, WI | Karyl F. Hahn |
| Casey | 1880 - Present | WI | Maureen Schulz |
| Chamberlain | 1873 - 1905 | MI, NY, WI | Karen Ann Johnson |
| Chambers | 1600 - Present | Co. Down, IRE | Barb Henzelmann |
| Chapman | 1822 - Present | ENG, WI | Jean Brisk |
| Charlton | 1729 - 1986 | MA, New Brunswick, MA | Betty Andrews Storey |
| Chase | 1700 - 1836 | MA, RI, NY, IL, WI | Bob Heck |
| Cieminski | 1800 - Present | POL, WI | Eileen Winger |
| Cierniak | 1825 - ???? | Poland | John Cieslewicz |
| Cieslewicz | 1825 - Present | Poland, IL, WI | John Cieslewicz |
| Clapp | 1840 - Present | GER, OH | Frances Ackermann |
| Claridge | 1815 - 1990 | ENG, WI | Wesley & Jane Hellen |
| Clark | 1500 - 1900 | ENG, RI, WI | Art Clark |
| Clem | 1755 - Present | ENG | Tom Keyes |
| Cline | 1780 - 1880 | VA, WV, IN | Patricia Hewitt |
| Cobb | 1600 - 1900 | ENG, MA | Cindy Schofield |
| Cobb | 1810 - 1873 | ME, IL, WI | Roger Cobb |
| Cole | 1907 - Present | MN, SD | Betty S. Spaar |
| Coleman | 1700 - Present | ENG, NY, WI | Howard & Jane Traeder |
| Connell | 1740 - 1791 | SCOT, NY | Jan LeTellier |
| Conrad | 1755 - Present | Altwiedelbach, GER | Tom Keyes |
| Cook | 1830 - 1960 | Prussia, WI | Peg O'Connell |
| Costello | 1807 - 1867 | IRE, MA, WI | Leo Costello |
| Covert | 1700 - 1786 | NETH, NY | Jan LeTellier |
| Coy(e) | 1766 - 1846 | CT, NH, MA, NY | Roger Cobb |
| Crandall | 1800 - Present | ENG, WI | Sharon G. Stolpa Worm |
| Crocker | 1850 - 1943 | MA, Nova Scotia, MA | Betty Andrews Storey |
| Cronk | 1850 - 1870 | VT, NH, WI | Guy Porth |
| Curdle | 1787 - Present | ENG, WI | Judy Newman |
| Cyborowski | 1700 - Present | POL, WI | Margaret Kurzynski |
| Daggett | 1600 - 1890 | ENG, MA | Cindy Schofield |
| Daleiden | 1837 - Present | Winfield, DuPage Co., IL | Jerry Daleiden |
| Daniel | 1849 - 1915 | POL, WI | Toni Daniels |
| Darmstadt | 1850 - 1900 | GER, WI | David Egldff |
| Davis | 1825 - 1890 | VT, NY, WI | Roger Cobb |
| de Serres/Seres | 1580 - 1722 | FR, NLD, ENG | EJ Brumder |
| Debus | 1830 - 1882 | GER, IL | Roger Cobb |
| Delaney | 1800 - Present | NY | Steve Arndt |
| Dellger | 1800 - 1882 | GER, WI | Leo Costello |
| DeLong | 1870 - Present | FRA, CAN, MI | Nancy Setlock |
| Dilley | 1800 - 1900 | KY, WI | James Muhlenhaupt |
| Dingman | 1850 - 1947 | WI | Ron Gruettner |
| Dolan | 1820 - 1962 | IRE, MI | Bev Good |
| Donald | 1650 - Present | SCOT, CAN, US | Margaret Kurzynski |
| Doncheck | 1800 - 1925 | WI | Al Koester |
| Donkersgoed | 1695 - Present | NLD, WI | Judy Newman |
| Dorothy | 1800 - 1900 | GER, WI | Al Koester |
| Dory / Dorey | 1750 - 1900 | ENG, NY | Nancy Roloff |
| Doucette | 1590 - Present | FRA, Quebec, MN, WI | James Gaboury |
| Douglass | 1800 - Present | NY, NJ | Anne Hazelwood |
| Draheim | 1822 - 1904 | Pomerania, WI | Beverly LaBelle |
| Droppers | 1830 - 1940 | HOL, WI | Wesley & Jane Hellen |
| Dublinski | 1820 - 1960 | POL, WI | Patricia Salske |
| Dukes | 1800 - Present | GER, WI | Sharon G. Stolpa Worm |
| Dunham | 1770 - 1810 | MA, ME | Barbara Bardeen Cobb |
| Dunlop | 1700 - Present | IRE, CAN | Margaret Kurzynski |
| Duren | 1850 - 1950 | WI | James Muhlenhaupt |
| Dutkiewicz | 1844 - 1914 | POL, WI | Toni Daniels |
| Dygert | 1800 - 1905 | NY, WI | Wesley & Jane Hellen |
| Eberhardt | 1820 - 1950 | GER, WI | Joslyn Zaffrann |
| Ebner | 1790 - 1900 | GER, WI | Karen Ann Johnson |
| Edel | 1858 - Present | POL, WI | Audrey Block |
| Edgar | 1826 - 1900 | Donegal, IRE, CAN, IRE | Patricia Hewitt |
| Edgeworth | 1884-1964 | IRE, UT, MT, CA, WI | Maureen & Bill Hilbert |
| Edwards | 1800 - 1850 | NY, WI | Guy Porth |
| Edwards | 1850 - Present | NB | Ken Graham |
| Edwards | 1750 - 1900 | VT, CT, NY, WI | Nancy Roloff |
| Egan | 1755 - Present | County Roscommon, IRE | Tom Keyes |
| Engelhardt | 1810 - 1946 | GER, WI | Ruth & Norman Schroeder |
| Erjavec | 1916 - Present | MN | Beverly Adamsky |
| Ertl | 1820 - 1948 | GER, WI | Joslyn Zaffrann |
| Evans | 1800 - 1850 | Wales | Louis E. Perry |
| Eyer | 1830 - 1950 | CAN, IN | Richard O'Connor |
| Falls | 1700 - Present | IRE, MD, CAN | Margaret Kurzynski |
| Fanning | 1810 - 1910 | NY, MI | Fred Riley |
| Farkas | 1840 - 1910 | Hungary, WI | Carolyn M. Nelson |
| Fehrenbach | 1873 - Present | MI, WI | Mary Swessel |
| Feld | 1840 - Present | GER, WI | Jeanette Ragner |
| Fenstemaker | ???? -1900 | OH | Jean Brisk |
| Feuling | 1800 - Present | GER, WI | Betty Andrews Storey |
| Fickau/Virchow | 1831 - 1881 | WI | Constance Stack |
| Filson | 1800 - 1900 | County Tyrone, IRE, PA | Jan Pientok |
| Fischer | 1835 - Present | MI, WI | Kathy Motz |
| Fisher | 1855 - 1936 | GER, WI | Leo Costello |
| Fix | 1810 - 1900 | GER, WI | Ron Gruettner |
| Flick | 1800 - Present | WI | Sharon G. Stolpa Worm |
| Folsom | 1898 - 1970 | WI, FL | Betty S. Spaar |
| Fors | 1870 - 1920 | SWE, SD | Douglas Foss |
| Forsyth | 1830 - Present | SCOT, CAN, OH, MI, WI | Susan Lind |
| Foss | 1860 - 1950 | SWE, SD | Douglas Foss |
| Foster | 1800 - 1860 | VA | Pauline Lindner |
| Foxwell | 1710 - Present | Cornwall ENG, WI | Roy Fritz |
| Fraser | 1650 - Present | SCOT | Margaret Kurzynski |
| Free | 1825 - 1855 | DC, CT, IL, WI | Richard Bentzler |
| Freeman | 1840 - 1945 | GER, MI, WI | Russell R. Retzack |
| Frei | 1800 - 1950 | Switzerland, IL, WI | Marion L. Getka |
| French | 1752 - 1860 | VT, NH | Guy Porth |
| French | 1700 - 1867 | MA, CT, NY | Jan LeTellier |
| Frey | 1800 - Present | GER, WI | Mary Ellen Timm |
| Fricke | 1744 - Present | GER, WI | Lois A. Marti |
| Friedmann | 1800 - 1900 | Baden, GER, Rochester, NY | Joan Borman |
| Fritz | 1700 - 1918 | GER, NY, CT | Lowell Alexander |
| Fritz | 1690 - Present | Weurt. GER, NB, CO, SD | Roy Fritz |
| Frost | 1820 - ???? | Poland | Deloris Cieslewicz |
| Fulder | 1900 - 1975 | MI, NY | Carolyn M. Nelson |
| Funk | 1800 - 1860 | NY | Louis E. Perry |
| Fusser | 1850 - 1860 | GER, Racine, WI | Charles Johnson |
| Gaboury | 1630 - Present | FRA, Quebec, MA, MN, WI | James Gaboury |
| Gainor | 1815 - 1932 | IRE, WI, MN | Bev Good |
| Galvin | 1840 - 1920 | NY City, NY | Maura Bournique |
| Gamerdinger | 1645 - Present | Wurtemburg, GER, CT, WI | John Gamerdinger |
| Ganswindt | 1800 - 1920 | GER, WI | Marion L. Getka |
| Garant | 1700 - Present | CAN, WI | Jim Braden |
| Garbe | 1800 - 1900 | GER, WI | Richard Garbe |
| Gargen | 1840 - Present | WI | Maura Bournique |
| Gates | 1800 - Present | WI | Sharon G. Stolpa Worm |
| Gatzke | 1867 - 1927 | Antigo, Milwaukee, WI | Constance Stack |
| Gauger | 1830 - 1870 | GER, WI, SD | Douglas Foss |
| Gauger | 1813 - 1950 | Prussia, WI, SD | Douglas Foss |
| Geib | 1782 - 1855 | Bavaria, GER, IL | Janice Burton |
| Geisinger | 1840 - 1970 | GER, WI | Wesley & Jane Hellen |
| Generke | 1829 - Present | GER, CAN, MI, WI | Susan Lind |
| Gengerke | 1829 - Present | GER, CAN, MI, WI | Susan Lind |
| Gengler | 1800 - Present | Esch-Sur-Sure, LUX | Jerry Daleiden |
| Genrich | 1800 - 1880 | GER | Howard Gennrich |
| Gentry | 1890 - Present | IL | Betty S. Spaar |
| Gerduordermark | 1790 - 1978 | GER, IN | Karyl F. Hahn |
| Gerondal | 1840 - Present | Belgium, WI | Mary Ellen Timm |
| Getka (Gadke) | 1800 - Present | Brand. GER, WI | Marion L. Getka |
| Gibson | 1700 - 1900 | Co. Armagh, IRE | Barb Henzelmann |
| Gill | 1700-1900 | PA | Annette Eliason |
| Gillies/Gillis | 1750 - 1833 | SCOT, NY | Jan LeTellier |
| Glamm | 1700 - Present | Pomerania, WI | Howard & Jane Traeder |
| Glander | 1814 - 1872 | GER, MN | Roger Cobb |
| Gleason | 1800 - Present | IRE, NY, WI | Steve Arndt |
| Glowacki | 1873 - 1960 | POL, WI | Toni Daniels |
| Gobler | 1800 - 1900 | GER, WI | Carolyn M. Nelson |
| Goddard | 1645 - 1952 | MA, New Brunswick, MA | Betty Andrews Storey |
| Goedecke | 1700 - Present | GER, USA | Marge Wilmes |
| Goerke | 1807 - Present | GER, WI | Ruth & Norman Schroeder |
| Goetz | 1796 - 1876 | GER, WI | Art Clark |
| Goetz | 1800 - 1920 | GER, WI | Art Clark |
| Goldman | 1800 - 1950 | Galgosz, CZ | Edwin Goldman |
| Goldsmith | 1675 - 1780 | ENG(?), Essex Co., MA | Betty Andrews Storey |
| Good | 1805 - Present | IRE, NJ, NY, WI, MN | Bev Good |
| Goold | 1755 - Present | ENG | Tom Keyes |
| Gorman | 1700 - 1800 | Co. Kerry, IRE | Maura Bournique |
| Gorny | 1836 - 1904 | Poland, WI | Deloris Cieslewicz |
| Graham | 1850 - Present | IL, NB, WI | Ken Graham |
| Granger | 1755 - Present | Bedfordshire, ENG | Tom Keyes |
| Greenwood | 1733 - ???? | Bellville, Mifflin, PA | Laurel Ingram |
| Gregory | 1834 - 1891 | GER, IL | Roger Cobb |
| Groh | 1840 - Present | WI | Maura Bournique |
| Groshek | 1865 - Present | POL, WI | Eileen Winger |
| Gruettner | 1850 - 1920 | GER, WI | Ron Gruettner |
| Guillam | 1700-1900 | PA, OH, IN | Annette Eliason |
| Gulgowski | 1800 - Present | West Prussia, GER, USA | Steve Gulgowski |
| Gulick | 1850 - 1860 | NOR, Dover, WI | Charles Johnson |
| Guthof | 1850 - 1915 | GER, WI | Bob Heck |
| Haagensen | 1850 - Present | DEN | Jan Pientok |
| Haasch | 1848 - 1943 | GER, WI | Kay Voss |
| Hagen/Hager | 1847 - 1857 | GER, WI | Frances Peg Mandery Hart |
| Hall | 1640 - 1750 | MA, ME | Barbara Bardeen Cobb |
| Hamann | 1824 - 1895 | GER, WI | Lois A. Marti |
| Hammerschmidt | 1848 - 1860 | NY, OH, WI | Guy Porth |
| Harms | 1800 - 1900 | GER, WI | Marion L. Getka |
| Hart | 1850 - 1950 | OH | Anne Hazelwood |
| Hart | 1879 - Present | POL, WI | Frances Peg Mandery Hart |
| Hart | 1830 - Present | IRE, CAN, NY, OH, WI | Joan Borman |
| Hart | 1570 - 1870 | ENG, CT | Lowell Alexander |
| Hartmann | 1868 - Present | Dodge Co., WI | Kathy Motz |
| Haslam | 1800 - 1911 | ENG, NY, IL | Janice Burton |
| Hassemer | 1600 - 1930 | GER, WI | Betty S. Spaar |
| Haubold | 1770 - 1880 | GER | Howard Gennrich |
| Haubrich | 1600 - Present | Daaden, GER, Kenosha, WI | Joan Borman |
| Hauser | 1816 - 1883 | Rubolstadt, GER, WI | Howard Gennrich |
| Havey | 1858 - 1935 | WI | Leo Costello |
| Hayden | 1750 - 1870 | MA, ME, WI | Barbara Bardeen Cobb |
| Hayden | 1794 - 1963 | PA, IN, WI, MN, CO | Karyl F. Hahn |
| Hayden | 1630 - Present | ENG, MA, NJ, PA, WI | Karyl F. Hahn |
| Hayes | 1815 - 1900 | VA, OH, WI | John Gamerdinger |
| Hazelwood | 1850 - Present | ENG, WI, CO, TX | Anne Hazelwood |
| Heck | 1790 - Present | GER, MN, WI | Bob Heck |
| Heimann | 1861 - 1912 | Posen, WI | Karen Ann Johnson |
| Heinek | 1765 - 1970 | GER, WI | Betty Andrews Storey |
| Heiss | 1868 - Present | GER, WI | Don Winger |
| Hellen | 1840 - Present | GER, WI, OK | Wesley & Jane Hellen |
| Hellriegel | 1866 - Present | GER, OH | Frances Ackermann |
| Hemmer | 1847 - Present | WI, IL, MI | Kathy Motz |
| Hengeveld | 1720 - Present | NLD, WI | Judy Newman |
| Henkes | 1800 - 1855 | GER, WI | Richard Bentzler |
| Henningfeld | 1650 - Present | GER, WI | Bob Heck |
| Henningfield | 1650 - Present | GER, WI | Bob Heck |
| Henzelmann | 1700 - Present | GER, WI | Barb Henzelmann |
| Herkowski | 1780 - Present | POL, WI | Eileen Winger |
| Herman | 1880 - Present | GER, NE, WI | Susan Lind |
| Herrmann | 1790 - 1883 | GER, WI | Betty Andrews Storey |
| Herson | 1700 - Present | Belgium, WI | Mary Ellen Timm |
| Hertel | 1700 - Present | GER, SO RUS, ND | Jim Braden |
| Hetzel | 1780 - 1910 | GER, WI | Nancy Roloff |
| Hewitt | 1834 - 1930 | Quebec, IRE | Patricia Hewitt |
| Heydrich | 1820 - Present | GER, WI | Lois A. Marti |
| Heyl | 1736 - 1788 | Gernany, NJ, PA | Laurel Ingram |
| Hicks | 1800 - 1920 | NY, MI | Fred Riley |
| Hilbert | 1885-Present | WI | Maureen & Bill Hilbert |
| Hile | 1764 - 1831 | Northumberland Co., PA | Laurel Ingram |
| Himman | 1700-1900 | PA, OR | Annette Eliason |
| Himmon | 1700-1900 | PA, OR | Annette Eliason |
| Hinchliff | 1800 - 1950 | ENG, NY, WI | Bev Good |
| Hinman | 1700-1900 | PA, OR | Annette Eliason |
| Hitzke | 1823 - Present | GER, WI | Ruth & Norman Schroeder |
| Hoeft | 1700 - 1860 | GER, WI | Howard & Jane Traeder |
| Hoehne | 1800 - 1950 | GER, WI | Betty Andrews Storey |
| Hoelscher | 1700 - Present | GER, MO | Marge Wilmes |
| Hoffman | 1890 - 1930 | WI, MN | Louis E. Perry |
| Hone/Hohn | 1852 - 1872 | GER, Oswego, NY | Charles Johnson |
| Hoogensen | 1850 - Present | DEN | Jan Pientok |
| Horvath | 1862 - 1913 | Austria, IL | Art Clark |
| Horvath | 1860 - 1920 | AUS/HUN, IL | Art Clark |
| Host/de Host | 1880 - 1890 | FRA, GER, WI | Charles Johnson |
| Howell | 1813 - 1919 | KY, IN, IL | Janice Burton |
| Howind | 1800 - Present | GER, MO | Marge Wilmes |
| Huber | 1870 - Present | Austria, GER, WI | James Gaboury |
| Huck | 1800 - 1960 | Baden, GER, Rochester, NY | Joan Borman |
| Huefner | 1808 - 1900 | GER, WI | Betty Andrews Storey |
| Huff | 1800 - Present | GER, PA, OH, MI | Fred Riley |
| Huneken | 1700 - Present | GER, USA | Marge Wilmes |
| Hunter | 1650 - Present | SCOT | Margaret Kurzynski |
| Husmann | 1710 - Present | GER, MN | Darlene Norman |
| Huston | 1730 - 1860 | IRE, ME | Barbara Bardeen Cobb |
| Huston | 1828 - 1920 | Quebec, IRE | Patricia Hewitt |
| Ingram | 1860 - Present | WA, OK?, WI | Laurel Ingram |
| Isham | 1650 - 1900 | MA | Cindy Schofield |
| Israelson | 1839 - Present | SWE, WI | Judy Newman |
| Jaeggin/Jaggi | 1700 - 1758 | Switzerland | Jan LeTellier |
| Jahnke | 1852 - 1900 | GER, WI | Kay Voss |
| James | 1850 - Present | Wales, WI | Anne Hazelwood |
| James | 1721 - 1764 | SC | Pauline Linoner |
| Janas | 1800 - Present | GER, USA | Steve Gulgowski |
| Janing | 1820 - Present | GER, WI | Lois A. Marti |
| Jazdzewski | 1770 - Present | POL, WI | Eileen Winger |
| Jeager | 1800 - Present | Faha, Saarland, GER | Jerry Daleiden |
| Jellison | 1740 - 1820 | ME | Barbara Bardeen Cobb |
| Jilek | 1838 - 1922 | Bohemia, MI, WI | Beverly LaBelle |
| Jobe/Job/Joab | 1815 - 1986 | Baden GER, NY, CT, RI | Peg O'Connell |
| Johnson | 1680 - 1800 | NH, ME | Barbara Bardeen Cobb |
| Johnson | 1800 - Present | SWE, MN | Darlene Norman |
| Johnson | 1881 - 1920 | NY, MI, WI | Karen Ann Johnson |
| Jordans | 1840 - Present | WI, IL | Kathy Motz |
| Jossart | 1600 - 1900 | Belgium | Barb Henzelmann |
| Jossliyor | 1800 - 1877 | NY, MI, IL, Waukesha, WI | Joan Borman |
| Jost | 1700-1900 | PA | Annette Eliason |
| Judon | 1830 - 1920 | PA, IN, IA, NB | Patricia Hewitt |
| Jung | 1800 - 1927 | GER, WI | Betty Andrews Storey |
| Jungen | 1852 - 1924 | WI | Ron Gruettner |
| Kaczmarek | 1850 - 1970 | POL, WI | Patricia Salske |
| Kaemmerer | 1800 - Present | GER, MN, WI | Marion L. Getka |
| Kalista | 1850 - 1990 | CR, WI | Len Borkowski |
| Kaminski | 1846 - Present | Poznan, POL, WI | Earl Komassa |
| Kansier | 1776 - Present | GER, WI | Lois A. Marti |
| Karnthaler | 1830 - 1950 | Austria, US | Robert C. Porath |
| Kaufman | 1863 - 1952 | WI | Leo Costello |
| Kaz | 1850 - 1930 | Siegen, GER, IL, WI | Joan Borman |
| Keefe | 1818-Present | IRE, KY, IL | Rita Keefe Rados |
| Keidrowski | 1800 - Present | POL, WI | Sharon G. Stolpa Worm |
| Keisker | 1750 - Present | GER, USA | Marge Wilmes |
| Keller | 1700 - Present | Bavaria, WI | Howard & Jane Traeder |
| Keohane | 1860 - 1920 | IRE | Art Clark |
| Kern | 1789 - 1931 | Bavaria, IL | Janice Burton |
| Kerr | 1600 - 1900 | Co. Armagh, IRE | Barb Henzelmann |
| Keyes | 1755 - Present | County Cork, IRE | Tom Keyes |
| Kielton | 1816 - Present | Austria, PA, IN | John Cieslewicz |
| Kienzle | 1817 - Present | Wurtemburg, GER | Jerry Daleiden |
| Kihm | 1840 - Present | WI | Kathy Motz |
| Kindt/Kind | 1775 - Present | GER, NY, WI | Ruth & Norman Schroeder |
| Kirbey | 1870 - 1900 | MI | Barb Henzelmann |
| Kirsenlohr | 1840 - Present | GER, WI | Nancy Roloff |
| Klasna | 1840 - 1950 | Austria, Bohemia, US | Robert C. Porath |
| Klawien | 1600 - Present | WI | Mary Swessel |
| Kleismet | 1800 - ???? | Poland | Deloris Cieslewicz |