| Surname | Country | State | County or Province | From | To | Member |
|---|---|---|---|---|---|---|
| Babiak | Austria | 1873 | 1943 | D016-1 | ||
| Babiak | USA | Oklahoma | 1873 | 1943 | D016-1 | |
| Babiak | USA | Illinois | Cook County | 1873 | Present | D016-1 |
| Bachhuber | Germany | Regensburg | Reglkofen | 1809 | 1846 | W008-1 |
| Bachhuber | Germany | Regensburg | Reglkofen | 1809 | 1846 | W008-1 |
| Bachhuber | USA | Wisconsin | Addison County | 1846 | 1851 | W008-1 |
| Bachhuber | USA | Wisconsin | Milwaukee County | 1851 | 1870 | W008-1 |
| Bachhuber | USA | Wisconsin | Mayville County | 1851 | 1870 | W008-1 |
| Bachielone | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | 1483 | 1690 | J009-1 |
| Bailey | USA | Kentucky | Carlisle County | 1830 | present | M012-1 |
| Baker | USA | Illinois | Crawford County | 1840s | A001-1 | |
| Baldensperger | France | Strausberg | 1865 | F008-1 | ||
| Baldwin | Ireland | County Tipperary | Tipperary | F006-2 | ||
| Baldwin | England | 1682 | present | S038-1 | ||
| Baldwin | USA | Pennsylvania | 1682 | present | S038-1 | |
| Bannister | USA | Massachusetts | 1600 | 1900 | M017-1 | |
| Baracree | Canada | Ontario | Grey County | 1860 | 1930 | A009-1 |
| Barbera | Italy | Liguria | Albenga Imperia | 1790 | 1860 | J009-1 |
| Barbera | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | 1841 | 1894 | J009-1 |
| Barcal | Czech Republic | Stozice near Vodnany | 1750 | 1930 | B023-1 | |
| Barker | Canada | Ontario | A002-1 | |||
| Barker | USA | New York | Erie County | 1857 | present | H018-1 |
| Barnes | Canada | Hull, PQ | 1840 | 1870 | B003-1 | |
| Barnes | D002-1 | |||||
| Barnes | USA | New York | Jefferson County | 1845 | F008-1 | |
| Barnoin | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | 1590 | 1690 | J009-1 |
| Baron | Belgium | 1890 | Present | T011-2 | ||
| Barrens | Canada | Saskatchewan | 1895 | present | B003-1 | |
| Barrett | Ireland | F006-2 | ||||
| Barsch | Germany | Rheinland | 1837 | 1958 | O001-1 | |
| Barsch | USA | Minnesota | Hennepin County | 1837 | 1893 | O001-1 |
| Barsch | USA | Illinois | Champaign County | 1893 | 1953 | O001-1 |
| Barsocchi | Italy | Tuscany | Lucca | J009-1 | ||
| Barsocchi | USA | Illinois | 1890 | 1988 | J009-1 | |
| Bartlett | USA | Massachusetts | Essex County | 1634 | 1800 | B023-1 |
| Bartlett | USA | Maine | Lincoln (Knox) County | 1770s | 1840 | B023-1 |
| Batts | USA | North Carolina | J009-1 | |||
| Bauer | K002-1 | |||||
| Bausch | Germany | Westphalia | 1680 | present | C008-1 | |
| Bautz | Germany | Posen | 1840 | present | P010-1 | |
| Bazman | Poland | Pommerania | 1820 | 1870 | T004-1 | |
| Beaudoin | France | B026-1 | ||||
| Beaudoin | Canada | Quebec | B026-1 | |||
| Beaudoin | USA | New Hampshire | Hillsborough County/Manchester | B026-1 | ||
| Becchi | Italy | Piemonte | Asti | 1715 | 1750 | J009-1 |
| Becchi/Bequy/Beque/Becco | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | 1755 | 1802 | J009-1 |
| Becker | Germany | F006-1 | ||||
| Becker | Germany | G015-1 | ||||
| Becker | USA | Illinois | Cook County | F006-1 | ||
| Beckjorden | Norway | Akerhus | Flesberg | 1836 | 1908 | O001-1 |
| Beeman | USA | South Carolina | J009-1 | |||
| Beiler | A010-1 | |||||
| Beland | France | 1800 | Present | T011-2 | ||
| Belcher | USA | Texas | Belcherville County | 1870 | 1920 | D005-1 |
| Belden | England | B038-1 | ||||
| Belden | USA | New York | B038-1 | |||
| Belden | USA | Wisconsin | B038-1 | |||
| Beltrandi | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | 1750 | 1650 | J009-1 |
| Benson | Sweden | Kronosberg | Virestad | 1870 | present | M023-1 |
| Benson | USA | Illinois | Cook County (Chicago) | M023-1 | ||
| Berdovich | B039-1 | |||||
| Bergondi | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | 1660 | 1720 | J009-1 |
| Bergquist | Sweden | 1870 | Y002-1 | |||
| Bergquist | USA | Illinois | Cook County | 1870 | present | Y002-1 |
| Bergstrom | Denmark | Maribo | Maribo | 1781 | 1890 | B019-1 |
| Bergstrom | USA | Illinois | Cook County | 1890 | 1948 | B019-1 |
| Berthelsen | Denmark | Bretholdsro | Asa | J009-1 | ||
| Bertolla | Italy | Trentino | Alto Adige | 1646 | 1870 | J009-1 |
| Bertolla | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | 1870 | 1916 | J009-1 |
| Best | USA | Ohio | Wyandot County | 1845 | 1860 | A009-1 |
| Best | M001-1 | |||||
| Best | USA | Ohio | Allen County | 1870 | present | A009-1 |
| Best | USA | Ohio | Richland | 1845 | 1880 | A009-1 |
| Bichler | Rheinland | S035-1 | ||||
| Bichler | USA | Illinois | Cook | 1840 | 1956 | S035-1 |
| Bickel | Germany | Hesse | 1770 | 1870 | L008-1 | |
| Bickel | USA | Pennsylvania | 1870 | present | L008-1 | |
| Bielmeier | A010-1 | |||||
| Bieshke | Prussia | Lauenberg | 1840 | ? | T004-1 | |
| Biles | Canada | London, Ontario | 1824 | 1930 | D011-1 | |
| Biles | USA | Maryland | Baltmore City and Charles County | 1865 | 1930 | D011-1 |
| Birrer | Switzerland | Luzern | Grossdietwil | 1816 | C017-1 | |
| Bitterleitner | Austria | Burgenland | 1830 | present | S005-1 | |
| Blackmer | A010-1 | |||||
| Blackstock | USA | Georgia | J009-1 | |||
| Blackwell | USA | Pennsylvania | Westmoreland County | 1850 | 1890 | B027-1 |
| Blancona | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | J009-1 | ||
| Blocker | Germany | H009-1 | ||||
| Blumenfeld | Romania | Botosani | K010-1 | |||
| Bogenschneider | Germany | Pomerania | Randow | B022-1 | ||
| Bogren | USA | Illinois | J010-1 | |||
| Bogren | Sweden | J010-1 | ||||
| Boissel/Boysseul | France | Périgord | Dordogne | 1674 | 1732 | J009-1 |
| Bolis | Italy | Emilia Romagna | Ravenna | 1790 | 1908 | J009-1 |
| Bond | England | Lancashire | 1600 | 1840 | D013-1 | |
| Bond | USA | Illinois | Peoria County | 1840 | present | D013-1 |
| Bond | USA | Illinois | Champaign County | 1840 | present | D013-1 |
| Boone | USA | Kentucky | 1750 | 1820 | G001-2 | |
| Boone | USA | Missouri | 1750 | 1820 | G001-2 | |
| Bottino | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | 1570 | 1674 | J009-1 |
| Bouchard | France | 1635 | present | S038-1 | ||
| Bouchard | Canada | 1635 | present | S038-1 | ||
| Bouchard | USA | Illinois | 1635 | present | S038-1 | |
| Bouret | France | Périgord | Dordogne | 1470 | 1879 | J009-1 |
| Bouret | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | 1880 | 1889 | J009-1 |
| Bowen | USA | Massachusetts | 1643 | 1876 | P012-1 | |
| Bowen | USA | New York | 1643 | 1876 | P012-1 | |
| Bowen | USA | Michigan | 1800 | 1876 | P012-1 | |
| Bower | C020-1 | |||||
| Bowers | USA | Minnesota | Wadena County | 1800s | A001-1 | |
| Bowles (Bolles) | USA | Maine | bef 1652 | 1864 | P012-1 | |
| Boy | France | Saone et Loire | Sornay | 1850 | F008-1 | |
| Boyle | Ireland | County Mayo | B038-1 | |||
| Brachet | France | Provence-Alpes-Côte-d'Azur | Alpes-Maritimes | 1570 | 1660 | J009-1 |
| Bradley | Ireland | E005-1 | ||||
| Bradley | USA | Illinois | Ogle, Winnebago, Cook | E005-1 | ||
| Brahm | Germany | Hessen | S035-1 | |||
| Brahm | USA | Illinois | Cook County | 1840 | 1956 | S035-1 |
| Bray | Canada | Soulanges, Quebec | 1710 | present | W020-1 | |
| Bray | USA | MN | Red Falls | 1880 | present | W020-1 |
| Bray | USA | MN | Polk | 1880 | present | W020-1 |
| Brehm | Germany | East Prusia | 1882 | B031-1 | ||
| Brennan | Ireland | B016-1 | ||||
| Brennan | USA | Illinois | Cook County | B016-1 | ||
| Brezki | Russia/Poland | Rogowo Parish | Bydgoszcz | 1846 | R003-1 | |
| Bridges | USA | Maine | Kittery, York County | 1750s | 1850 | B023-1 |
| Briscoe | Ireland | Kings/Offaly | bef 1850 | 1850 | S029-1 | |
| Brittingham | USA | Maryland | Worcester County | 1750 | 1830 | K008-1 |
| Brittingham | USA | Ohio | Scioto County | 1800 | K008-1 | |
| Brock | Ireland | County Dublin | 1800 | present | B032-1 | |
| Brokaw | USA | Illinois | M028-1 | |||
| Brooks | USA | PA | Allegheny | 1917 | 1957 | B020-1 |
| Brooks | USA | NB | Dawes | 1889 | 1940 | B020-1 |
| Brooks | USA | Kentucky | Madison County | 1796 | 1840 | P003-1 |
| Brooks | USA | SC | Edgefield | B020-1 | ||
| Brooks | USA | Indiana | Orange County | 1840 | 1857 | P003-1 |
| Brooks | USA | Kansas | Douglas County | 1857 | 1876 | P003-1 |
| Brooks | USA | Kansas | Butler County | 1876 | 1950 | P003-1 |
| Brooks | USA | Oklahoma | Payne County | 1890 | 1910 | P003-1 |
| Brower | USA | Kentucky | Hickman County | 1830 | present | M012-1 |
| Brown | USA | Minnesota | M031-2 | |||
| Brown | USA | W012-1 | ||||
| Brownsberger | Germany | 1800 | Present | G009-1 | ||
| Brownsberger | USA | Ohio | Wood County | 1800 | Present | G009-1 |
| Brownsberger | USA | Pennsylvania | Lancaster County | 1800 | Present | G009-1 |
| Bruckner | Austria | F011-1 | ||||
| Bruderer | Switzerland | Appenzell | Speicher | 1580 | 1720 | B018-1 |
| Bryant | England | 1600 | M017-1 | |||
| Bryson | USA | Virginia | Harrison County | 1824 | T007-1 | |
| Bryson | USA | Indiana | Switzerland | 1844 | 1883 | T007-1 |
| Brzyski | Prussia | 1841 | 1913 | T004-1 | ||
| Bub | USA | Illinois | Adams county | P013-1 | ||
| Buchanan | Scotland | Fife | Dunfermline | 1850 | B031-1 | |
| Buehler | Germany | H001-1 | ||||
| Buetow | Germany | S035-1 | ||||
| Buetow | USA | Minnisota | Sherbourne County | S035-1 | ||
| Buff | Switzerland | Appenzell | Wald | 1700 | 1725 | B018-1 |
| Bunch | USA | North Carolina | Perquinmans County | 1784 | 1890 | M001-1 |
| Bunch | USA | Indiana | Warren County | 1784 | 1890 | M001-1 |
| Burger | USA | KS | W020-1 | |||
| Burger | USA | KS | W020-2 | |||
| Burgess | USA | Kentucky | Hickman County | 1780 | present | M012-1 |
| Burke | Ireland | County Tipperary | 1800 | 1840 | N001-1 | |
| Burke | USA | Minnesota | McLeod County | 1855 | present | N001-1 |
| Burke | USA | Missouri | Saint Louis County | 1849 | 1855 | N001-1 |
| Burke | USA | Illinois | Marshall County | 1850 | 1870 | N001-1 |
| Burns | USA | Illinois | Kane County | 1880 | present | D011-1 |
| Burns | USA | Ohio | Butler County | 1860 | 1930 | D011-1 |
| Burow | Germany | Pomerania | Cammin | B022-1 | ||
| Burroughs | USA | SC | Spartansburg, Union County | 1830 | 1887 | B020-1 |
| Burroughs | USA | IL | Cook | B020-1 | ||
| Burwitz | Germany | Rugen | S035-1 | |||
| Burwitz | USA | Illinois | Cook | 1840 | 1956 | S035-1 |
| Bush | USA | Illinois | White | 1860 | 1930 | F014-1 |
| Bush | S003-1 | |||||
| Bush | USA | Arkansas | 1860 | 1930 | F014-1 | |
| Butler | USA | Missouri | B005-1 | |||
| Butler | USA | Kentucky | B005-1 | |||
| Butler | USA | Mississippi | Lee County | 1800 | 1987 | B018-1 |
| Butler | USA | Tennessee | Tipton | 1870 | Present | F014-1 |
| Butler | Ireland | before 1850 | M019-1 | |||
| Butler | USA | South Carolina | 1800 | 1987 | B018-1 | |
| Butler | USA | South Carolina | 1870 | Present | F014-1 | |
| Butler | USA | 1850 | present | M019-1 | ||
| Butler | USA | Mississippi | Chickasaw County | 1800 | 1987 | B018-1 |
| Butler | USA | Mississippi | Pontotoc County | 1800 | 1987 | B018-1 |
| Byrnes | USA | Illinois | Cook County | 1890 | present | B003-1 |
| Byrns | Canada | Hull, PQ | 1840 | 1870 | B003-1 |