| Surnames | Time Period | Researcher |
| Adams | 1904 - 1937 | Vicki Ames |
| Adcock | 1910 - now | Carl Adcock |
| Aitken | 1950 - 1962 | Marvin Huff |
| Alexander | 1879 - | Mike Graham |
| Allison | 1875 - 1910 | Jan LaMotte |
| Alspaugh | 1900 - 1979 | Ray Downing |
| Anderson | . | Teresa Church |
| Anderson | 1935 - 1945 | Pat Lifke |
| Andrews | 1880s - 1961 | Stephen M. Andrews |
| Angleton | 1920 | Kim Duren |
| Antrim | 1870s | Michael Wallis |
| Apperson | 1950 - 1960 | Tina Workman |
| Archambeault | 1911 - 1915 | Patricia Archambeault |
| Armour | 1890 - now | Timothy Armour |
| Armour | . | Suzanne Deal Sellers |
| Ash | 1891 - 1930 | Tammie |
| Ashby | 1890 - now | Jenna Scott |
| Ashworth | 1800s - now | Herbert Ray Ashworth |
| Atkins | 1920 - now | Ralph R. Atkins |
| Augustus | 1895 - 1955 | Louise |
| Austin | 1858 - 1918 | Jim Austin |
| Averill | 1900 - 1920 | Frankie (Carlin) Meyer |
| Babb | 1916 - 1940 | G. Babb |
| Baggarly | 1860 - 1920 | N. Boland |
| Bagwell | 1943 - 1944 | Hope Brush |
| Baird | 1920 - 1940 | Kathey Baird Benoit |
| Baker | 1858 | Shirley Black |
| Baker | 1932 - 1950 | Teri Colpitts |
| Baker | 1950 - 1999 | Aaron Baker |
| Bakken | 1880 - 1920 | Brian Joseph Caffrey |
| Baldwin | 1860 - now | Jo Ann Baldwin |
| Ball | 1872 - now | M. Waldron |
| Ball | 1872 - 1873 | Muriel Waldron |
| Ballinger | 1907 | Patriccia Hammond |
| Banks | 1860 - 1912 | C. Ewan |
| Barhart | . | Jenell Rector Cremeans |
| Barker | 1912 | Pat Grimm |
| Barnett | 1884 - 1885 | David Barnett |
| Barney | 1874 - now | Allen Clark |
| Bartlett | 1924 | Dawn Bartlett Beals |
| Baughman | 1900 - now | Bill Baughman |
| Baxter | 1880 - 1984 | Heather Livingston |
| Bean | c1937 | Catherine Pogan |
| Beardslee | 1900 - now | Robert W. Howard II |
| Beaver/Beavers | ? - early 1900s | Sandra Jones |
| Bebee/Beebe | 1870 - 1879 | Bob Stahl |
| Beeson | . | Larry D. Brooks |
| Bell | 1833 - 1869 | Leslie Davis |
| Bell | 1860 | Jane Wallace |
| Benham | c1920 - 1960 | Edward Miller |
| Beran | 1895 - 1945 | Krista Warstler |
| Bertram | 1930 | Robert Stark |
| Betlach | 1877 | Frances Spagnoletti |
| Betzen | 1870s - 1900 | Michael Hamersky |
| Biering | . | Houstin R. Hutton |
| Biermann | 1830 - now | Tony Smith |
| Bidwell | . | Mary Grabanski |
| Biggs | 1919 - 1946 | Rkaye |
| Billenwillms | 1936 - 1939 | Sheila Harris |
| Bilyeu | 1920 - 1950 | V. Calvin |
| Bisby | 1881 - now | Gidge |
| Bishop | . | Mary Grabanski |
| Black | 1880 - 1910 | Robert Black |
| Blackwell | ? - 1982 | Nichol |
| Blain | 1900 - 1940 | Juanita Schneider |
| Bliss | . | Gary Haas |
| Bluma | John Hoyer | |
| Boland | . | N. Boland |
| Boling | 1890 - 1908 | Norma Murphy |
| Bosley | 1860 - now | Duane Bosley |
| Boston | c1941 - ? | Jayne Genter |
| Botkin | 1865 | Myrna Fredericksen |
| Boughton | 1890-1910 | Fred W. Boughton |
| Bowden | 1940 - 1960 | Laralea Stehwein Whetstine |
| Bowers | 1928 - 1933 | Shirley B. Gaesser |
| Bowman | 1875 - 1898 | Kim Campbell |
| Bowmer | 1940 | LeAnna Bradley |
| Bradfield | 1920s | Laura Bradfield Pollard |
| Braddy | 1930 - now | Christopher Lynn Braddy Conner |
| Bragg | 1870 - 1905 | Michael Stinson |
| Braitsch | 1900 - 1950 | Kim Wright |
| Brasier | 1898 | Tessie Weston |
| Brengle | 1888 | Chuck Brengle |
| Brett | 1877 - 1889 | Gerald Piper |
| Bridenstine | . | Harry Vredingburgh |
| Briley | 1880 - 1888 | Deleana Adams |
| Bristow | . | Bob Nevins |
| Britt | 1877 - 1889 | Gerald Piper |
| Broadfoot | 1890 - 1900 | Leilani O'Reilly |
| Brooke | . | Sureshkumar Dave |
| Broughton | 1860 - now | Erika |
| Broughton | 1880 - 1890 | Richard Broughton |
| Brownell | W. A. Brownell | |
| Bruce | 1870 - now | Becky Clark |
| Buchanan | 1895 - 1965 | Darlene Kneaves |
| Buller | 1860 - | Mary Klassen |
| Bullinger | 1800s - 1900s | Michelle Lawther Fradella |
| Bump | 1870 - 1905 | Michael Stinson |
| Burke | c1880 - 1905 | Margret Atwood |
| Burke | 1900 - 1905 | Janis E. Freeman |
| Burkhart | 1910 - 1977 | Mary Lois Burkhart Hibbard |
| Burnett | 1910 | William Waite |
| Burnett | 1880s - 1930s | Glenda Cashmer |
| Burns | 1885 - 1930 | Gina Marie Burns |
| Burris, Virginia | 1914 - 1972 | Ann Still |
| Burton | 1900 - 1910 | Marlene J. Shaw |
| Butler | 1860 - now | Barbara Hill Tabor |
| Butler | 1860 - 1900 | Kathryn Andres |