| Surname | Country | State | County or Province | From | To | Member |
|---|---|---|---|---|---|---|
| Hackman | Germany | Hamburg | 1840 | 1935 | B018-1 | |
| Hales | USA | P013-1 | ||||
| Haley | USA | Maine | 1618 | 1765 | P012-1 | |
| Hall | USA | Ohio | Defiance County | A007-1 | ||
| Hall | USA | Virginia | Henry Country | 1765 | 1815 | H012-1 |
| Hall | USA | Ohio | Pickaway County | 1814 | 1936 | M001-1 |
| Hall | USA | Kentucky | P013-1 | |||
| Hall | USA | Ohio | Champaign County | 1815 | present | H012-1 |
| Hall | USA | Indiana | Howard County | 1814 | 1936 | M001-1 |
| Hall | USA | Virginia | P013-1 | |||
| Hall | USA | Illinois | Vermilion County | 1814 | 1936 | M001-1 |
| Hamernik | Poland | Boldury | 1850 | Present | H014-1 | |
| Hammer | Germany | Bavaria | Rittendorf | 1853 | W008-1 | |
| Hammer | USA | Tennessee | Westford Township | 1853 | present | W008-1 |
| Hammer | USA | Wisconsin | Dodge County | 1853 | present | W008-1 |
| Hammond | USA | Michigan | 1843 | 1900 | H018-1 | |
| Harders | Germany | Schleswig-Holstein | Nordeich/Wesselburen | 1650 | present | S005-1 |
| Hardtke | West Prussia | S035-1 | ||||
| Hardtke | USA | Wisconsin | Kewaunee County | S035-1 | ||
| Hardtke | USA | Illinois | Cook | 1840 | 1956 | S035-1 |
| Harlow | A010-1 | |||||
| Harmata | Austria Hungary | W020-1 | ||||
| Harmata | USA | MN | 1880 | present | W020-1 | |
| Harmon | USA | Kansas | W012-1 | |||
| Harmon | USA | Missouri | W012-1 | |||
| Harmon | USA | Colorado | W012-1 | |||
| Harn | USA | Kentucky | bef 1826 | 1940 | S029-1 | |
| Harpour | United Kingdom | 1906 | M024-1 | |||
| Harris | A010-1 | |||||
| Harrison | USA | Wisconsin | Waukesha County | 1820 | 1900 | C022-1 |
| Hart | Czech Republic | Lisov near Ceske Budejovice | 1750 | 1950 | B023-1 | |
| Hartel | USA | Illinois | Cook County | 1850 | 1950 | B023-1 |
| Havlik | Czechoslovakia | Moravia | Rokytno | 1845 | 1869 | S009-1 |
| Havlik | USA | Nebraska | Saline County | |||
| Havlik | USA | Minnesota | McLean County | 1875 | 1923 | S009-1 |
| Hayden | Germany | M026-1 | ||||
| Hayden | USA | Michigan | M026-1 | |||
| Hayes | USA | Michigan | M026-1 | |||
| Haynes | USA | New York | M026-1 | |||
| Haynes | USA | Michigan | ||||
| Haynie | USA | Virginia | P013-1 | |||
| Haynie | USA | Missouri | P013-1 | |||
| Hazelwood | England | 1850 | H022-1 | |||
| Hebert | France | B026-1 | ||||
| Hebert | Canada | Quebec | B026-1 | |||
| Hebert | USA | New Hampshire | Hillsborough County/Manchester | B026-1 | ||
| Heckathorn | USA | Ohio | Wyandot County | 1800 | present | H012-1 |
| Hedberg | Sweden | Kopparburg (Dalarme) | Sundborn | G015-1 | ||
| Hedges | USA | Delaware | New Castle County | 1673 | 1738 | T009-1 |
| Hedges | USA | Virginia | Berkeley county | 1738 | 1820 | T009-1 |
| Hedman | Sweden | Kopparburg (Dalarme) | Sundborn | G015-1 | ||
| Heidorn | Germany | K019-1 | ||||
| Heinrich | Germany | F006-1 | ||||
| Heinrich | USA | Illinois | F006-1 | |||
| Heinrich | W019-1 | |||||
| Heldt | Germany | H001-1 | ||||
| Henderson | USA | Wisconsin | Dane County | 1846 | 1902 | T007-1 |
| Henderson | USA | Illinois | Cook County | 1902 | present | T007-1 |
| Hendrick | USA | Connecticut | 1630 | present | P012-1 | |
| Hendrick | USA | New York | 1630 | present | P012-1 | |
| Hendrick | USA | Michigan | 1800 | present | P012-1 | |
| Hendricks | USA | Illinois | St. Clair County | 1790 | present | M011-1 |
| Hendrickson | A010-1 | |||||
| Hene | Germany | Bavaria | 1838 | present | H018-1 | |
| Henke | Germany | Westphalia | 1870 | Y002-1 | ||
| Hennis | USA | Kentucky | bef 1760 | 1850 | S029-1 | |
| Hennis | USA | Virginia | bef 1760 | 1850 | S029-1 | |
| Hennon | USA | Kansas | W012-1 | |||
| Henton | USA | Missouri | P013-1 | |||
| Herbert | Canada | B016-1 | ||||
| Herbert | USA | New York | B016-1 | |||
| Herbert | USA | Illinois | B016-1 | |||
| Herbst | USA | Illinois | Cook County (Leyden Township) | 1846 | present | M023-1 |
| Herman | Germany | H001-1 | ||||
| Herrmann | Germany | H007-1 | ||||
| Hersey | A010-1 | |||||
| Hertenegger | Switzerland | Appenzell | Trogen | 1550 | 1600 | B018-1 |
| Hessburg | Germany | Rheinland | 1857 | present | O001-1 | |
| Hessburg | USA | Minnesota | Hennepin County | 1880 | present | O001-1 |
| Hill | A010-1 | |||||
| Hill | USA | Maine | 1635 | 1760 | P012-1 | |
| Hinckley | K002-1 | |||||
| Hinkley | K002-1 | |||||
| Hinnant | USA | North Carolina | 1830 | 1902 | J009-1 | |
| Hinterman | Switzerland | Zurich | 1800 | 1850 | T009-1 | |
| Hintze | Germany | Baveria | bef 1840 | 1840 | M019-1 | |
| Hintze | USA | Wisconsin | 1840 | present | M019-1 | |
| Hochstetler | Switzerland | 1635 | present | S038-1 | ||
| Hochstetler | USA | Pennsylvania | 1635 | present | S038-1 | |
| Hodgson | Canada | B031-1 | ||||
| Hodgson | USA | B031-1 | ||||
| Hoffman | Germany | Weiler | 1800 | present | S005-1 | |
| Holder | USA | Pennsylvania | Cambria County | 1835 | 1878 | T007-1 |
| Holder | USA | Indiana | Switzerland | 1835 | 1878 | T007-1 |
| Holish | Slovokia | Orvca, City Tvrdosin | 1780 | 1899 | H011-1 | |
| Holloway | USA | Missouri | Gentry County | P013-1 | ||
| Honeyman | M027-1 | |||||
| Hongran/Ongran | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | 1540 | 1750 | J009-1 |
| Hooker | USA | Maryland | Baltimore City | 1795 | 1930 | D011-1 |
| Horning | USA | Pennsylvania | Montgomery County | 1800s | A001-1 | |
| House | USA | Virginia | Culpeper County | 1750 | 1800 | F009-1 |
| House | USA | Ohio | Preble County | 1800 | 1950 | F009-1 |
| How(e) | A010-1 | |||||
| Howell | USA | Maine | 1624 | 1716 | P012-1 | |
| Hubbard | England | bef 1920 | D005-1 | |||
| Hubbard | USA | Connecticut | 1635 | present | P012-1 | |
| Huber | Switzerland | Luzern | Grossdietwil | 1816 | C017-1 | |
| Hudnal | USA | Virginia | P013-1 | |||
| Hudnal | USA | Missouri | P013-1 | |||
| Hudy | Canada | Saskatchewan | Regina | 1890 | Present | K022-1 |
| Hughes | USA | Kentucky | Hickman County | 1820 | present | M012-1 |
| Hull | USA | Maine | 1595 | 1732 | P012-1 | |
| Humphrey | England | Kent | D013-2 | |||
| Humphrey | USA | New York | Hudson County | 1820 | present | D013-2 |
| Humphrey | USA | New Jersey | Hudson County | 1820 | present | D013-2 |
| Hunsley | USA | Illinois | Macon County | 1880 | present | M025-1 |
| Hunsley | England | 1830 | M025-1 | |||
| Hunt | USA | Massachusetts | Norfolk County | 1830 | 1895 | B035-1 |
| Hunt | USA | Michigan | Kalamazoo County | 1830 | 1895 | B035-1 |
| Hunter | USA | Alabama | J009-1 | |||
| Huntington | M026-1 | |||||
| Hurley | USA | IL | Kankakee County | 1900 | Present | K026-1 |
| Hurley | USA | NY | K026-1 | |||
| Hurt | Czechoslovakia | H009-1 | ||||
| Husander | Sweden | Gotland | Levide | 1783 | 1850 | T007-1 |
| Husby | Norway | Sor-Trondelag | Holonda | 1698 | 1976 | O001-1 |
| Husby | USA | Wisconsin | St.Croix County | 1698 | 1976 | O001-1 |
| Husby | USA | Minnesota | Hennepin County | 1698 | 1976 | O001-1 |
| Hussander | USA | Illinois | Cook County | 1853 | 1943 | T007-1 |
| Hyde | M026-1 |