| Baake | Baakko | Bakkonen | Baanna | Baardsen | Baardson | Baas | Babajoff | Babb |
| Babbitt | Babbmis | Babcock | Babich | Babst | Bach | Bachleitner | Bachman | Bachmann |
| Bachmeier | Bachover | Bachs | Back | Backa | Backen | Backer | Backlund | Backstrom |
| Bacon | Badgett | Baekkestad | Baer | Baertsch | Baggenstos | Bagley | Baglien | Baglo |
| Bagstevold | Baham | Bahle | Bahls | Bahr | Baier | Bail | Bailey | Baird |
| Bajenske | Bajumpaa | Bakeman | Baker | Bakka | Bakke | Bakken | Bakkila | Balcer |
| Balcom | Baldes | Baldwin | Baleszor | Balfany | Balfour | Balgaard | Balken | Ball |
| Ballandby | Ballard | Ballestad | Ballou | Balstad | Balzer | Bamberg | Bandholtz | Bang |
| Bangen | Bangle | Bangs | Banick | Bankord | Banks | Banner | Banttari | Barbeau |
| Barbor | Barclay | Bardalen | Barden | Bardwell | Bares | Barke | Barker | Barkes |
| Barkis | Barkley | Barkman | Barley | Barnack | Barnard | Barnes | Barnett | Barnhard |
| Barnhart | Barns | Barnum | Barnwell | Barr | Barratt | Barrie | Barriey | Barringer |
| Barron | Barrows | Barry | Barsby | Barsness | Barta | Bartels | Bartelson | Bartelt |
| Barthel | Barthels | Bartholamew | Bartimus | Bartkowski | Bartlett | Barto | Barton | Bartowski |
| Basaric | Bashel | Bass | Bastman | Batchelor | Batcher | Bates | Batson | Battleson |
| Batzlaff | Bauck | Baudine | Baudoin | Bauer | Baum | Bauman | Baumann | Baumer |
| Baumgardner | Baumgart | Baumgarten | Baumgartner | Baundsen | Baurquin | Baurs | Bautch | Baxter |
| Bay | Bayer | Bayley | Beach | Beacher | Beadle | Beal | Beam | Beaman |
| Beamish | Beane | Beard | Beards | Beardsley | Bearnes | Beaswold | Beattie | Beaty |
| Beaulieu | Beaupre | Beberg | Bechhold | Bechtel | Bechtold | Beck | Becken | Beckenhauer |
| Becker | Beckerly | Beckers | Beckett | Becklund | Beckman | Beckmann | Beckner | Beckos |
| Beckstrom | Beckwith | Beddill | Bednarz | Bedwell | Beecher | Beeck | Beecroft | Beedle |
| Beedy | Beehler | Beeler | Beeman | Beers | Beeson | Bega | Beganovic | Begg |
| Begstad | Behnke | Behr | Behrens | Beighley | Beikoff | Beiningen | Beireis | Beitey |
| Beito | Beitz | Bekke | Bekkerus | Belager | Beland | Belden | Beldo | Beldoniemi |
| Belgum | Belka | Bell | Belland | Bellanger | Bellcourt | Bellefeuille | Bellet | Bellinger |
| Bellman | Bellmore | Bellonny | Belmont | Belonger | Belswik | Beltz | Belz | Bemis |
| Benchain | Bender | Bendickson | Bendix | Bendlen | Benedick | Bengstorf | Bengson | Bengston |
| Bengtsen | Bengtson | Benhardus | Benjamin | Benjaminson | Benke | Benmiller | Bennen | Bennett |
| Benning | Benpre | Bensen | Benshoof | Benson | Benterud | Bentfield | Benti | Bentilla |
| Bentley | Bentrud | Benttila | Bentz | Benzel | Benzing | Benzinger | Benzman | Benzmann |
| Berbeck | Bercovitz | Berend | Berfield | Berg | Bergan | Bergby | Berge | Bergebakken |
| Bergem | Bergen | Bergene | Berger | Bergerson | Bergerud | Berges | Bergeson | Berget |
| Bergford | Berggren | Bergh | Bergloff | Berglov | Berglund | Bergman | Bergner | Bergquist |
| Bergren | Bergrud | Bergseth | Bergsland | Bergstad | Bergsten | Bergstrom | Bergtoll | Bergum |
| Beringer | Berjeck | Berkland | Berlie | Berman | Bermann | Bernard | Bernauer | Berndt |
| Berner | Bernier | Berns | Berntson | Bernu | Berquist | Berry | Berstad | Bersvensdatter |
| Bertek | Bertelsen | Berthold | Bertilrud | Bertkaris | Bertleson | Bertram | Berven | Bervig |
| Besel | Beske | Besselaar | Besstad | Best | Bestad | Bestic | Betke | Beshke |
| Betigl | Bettcher | Betterman | Bettin | Betty | Beving | Bevins | Beyer | Beyersdorff |
| Bezenek | Bianco | Bice | Bickel | Bickford | Bickle | Bieault | Biederman | Biegel |
| Biegert | Biegler | Bienick | Biermann | Biersdorff | Bierwagen | Bierwagon | Biery | Bigarel |
| Bigger | Biggerstaff | Biggs | Bigler | Bigot | Biksen | Bilden | Billemeir | Billet |
| Billey | Billings | Billington | Bimberg | Bingham | Bingston | Binkowski | Biorn | Birch |
| Birchem | Bird | Birdsall | Birmingham | Bischoff | Bisenius | Bishop | Bissett | Bissinger |
| Bistrom | Bitterfield | Bittgers | Bittmann | Bittner | Bixby | Bjarra | Bjelland | Bjergaard |
| Bjergo | Bjerkaas | Bjerke | Bjerkebek | Bjerkeeg | Bjerkeng | Bjerketvedt | Bjerkness | Bjertnes |
| Bjertness | Bjilla | Bjone | Bjor | Bjoralt | Bjorgaard | Bjorgan | Bjorge | Bjorgen |
| Bjorgo | Bjorgum | Bjork | Bjorka | Bjorkland | Bjorklund | Bjorkman | Bjorkrud | Bjorksten |
| Bjorn | Bjornaas | Bjorndal | Bjornes | Bjorness | Bjornlie | Bjornson | Bjornstad | Bjornstrom |
| Bjostelson | Bjugstad | Bjurnes | Blace | Black | Blackburn | Blackey | Blackman | Blad |
| Blaeser | Blaha | Blair | Blaisdell | Blake | Blakesley | Blakslee | Blanchard | Blanker |
| Blashack | Blass | Blatchle | Blatti | Blatz | Blatzer | Bleeker | Blegen | Blegstad |
| Bleichner | Blevins | Blew | Bliem | Blikstad | Blileus | Bliss | Blissenback | Bliton |
| Blix | Bloch | Block | Blok | Blom | Blomberg | Blomental | Blomke | Blomquist |
| Blondeau | Blondell | Blood | Bloom | Bloomfield | Bloomquist | Blount | Blowers | Bluhm |
| Blumer | Blumstrum | Blyberg | Boardson | Boasch | Bobeng | Bobzien | Bock | Bockhaus |
| Bockoven | Boden | Bodas | Boden | Bodenstine | Bodforss | Boe | Boeck | Boecker |
| Boeckman | Boeder | Boedigheimer | Boeger | Boehl | Boehland | Boehmke | Boehne | Boehner |
| Boek | Boellie | Boelter | Boelz | Boen | Boesch | Boese | Boetcher | Boettcher |
| Boettger | Bogart | Bogden | Bogen | Bogenreif | Bogenschuetz | Boggs | Bogstad | Bohach |
| Bohlin | Bohlke | Bohn | Bohne | Bojekuk | Bokken | Boland | Bolander | Boldt |
| Boles | Bolinder | Boline | Boll | Bolland | Bollinger | Bollingmo | Bollum | Bolma |
| Bolme | Bolmgren | Bololie | Bolstad | Bolten | Boltz | Bon | Boncier | Bond |
| Bondelid | Bonderud | Bondy | Bonesteel | Bonewell | Bongard | Bongo | Bonn | Bonner |
| Vonney | Bonser | Bonte | Booen | Boogaard | Boomgaarden | Boon | Boone | Boor |
| Boorash | Booth | Bope | Bopp | Borby | Borchard | Borchardt | Borchordt | Borchers |
| Borck | Borden | Bordlean | Bordson | Bore | Boren | Borg | Borge | Borgen |
| Borgerson | Borgert | Borgos | Borgud | Borgstrom | Borkud | Bormann | Borowski | Borseth |
| Borst | Borup | Bosen | Bosley | Boss | Bostrom | Boswell | Bosworth | Bothum |
| Bothun | Botner | Bottem | Bottineau | Botts | Botz | Boucher | Bouchey | Boughtin |
| Bouins | Boulden | Bouressa | Bourgue | Bourque | Boushley | Bowe | Bowen | Bowers |
| Bowker | Bowman | Boyce | Boyd | Boyer | Boyington | Boyle | Boyles | Boyn |
| Boyne | Boysen | Boyum | Bozont | Bozzell | Braalin | Braasch | Braatelien | Braaten |
| Braating | Braatz | Brabec | Braber | Brack | Brackett | Brackin | Bradbury | Braddock |
| Bradehoft | Bradley | Bradly | Bradow | Bradt | Brady | Brager | Bragg | Brakke |
| Braman | Braman | Brambel | Bramm | Bramstad | Brancato | Brandborg | Branden | Brandenburg |
| Brandhagen | Brandl | Brandlund | Brandon | Brandslien | Brandstrom | Brandt | Brandvig | Brandvold |
| Branley | Brannen | Bransted | Branstner | Brase | Brasel | Brasseau | Brasseth | Brastad |
| Braten | Brathing | Bratlie | Bratlien | Braton | Bratsch | Bratt | Bratten | Bratvold |
| Bratwold | Brau | Brauch | Braud | Braukmann | Braun | Brause | Bray | Brayson |
| Breck | Bredahl | Bredberg | Bredehoft | Bredelson | Bredenberg | Bredesen | Bredeson | Bredow |
| Breen | Breeton | Breher | Breiby | Breid | Breit | Breitenbauch | Breitenbaugh | Breitenfeld |
| Breitenfeldt | Brekke | Bremer | Bremmer | Brenaman | Brend | Brendecke | Brenden | Brendle |
| Brenna | Brennan | Brensike | Breuer | Breunig | Brevig | Brewer | Brewster | Brichnian |
| Brien | Briese | Brietenbauch | Briggs | Brigham | Bright | Brightman | Brightnose | Brill |
| Brimhall | Brincefield | Briner | Brink | Brinkman | Bristol | Bristow | Britz | Brock |
| Brockhoff | Brocklehurst | Brockmann | Brockoff | Brockopp | Brodahl | Brodalen | Brodersen | Brodin |
| Brodkorb | Brodreskift | Brodsho | Broekker | Broen | Brogard | Brokhoff | Brolin | Bromseth |
| Bronseteh | Bronson | Broomberg | Brooker | Brooks | Brophy | Brorson | Broschat | Brosseau |
| Broten | Brothen | Broughton | Brouk | Broun | Brovold | Brower | Brown | Brownell |
| Broyton | Bruce | Brudervich | Brudvig | Brue | Bruening | Bruesewitz | Brueske | Bruestle |
| Bruhl | Bruhn | Brumbly | Bruner | Brunet | Bruning | Brunko | Brunkow | Brunn |
| Bruns | Brunson | Brusewitz | Brush | Brustad | Brusven | Brutag | Bruvold | Bryan |
| Bryant | Bryce | Brydahl | Brye | Bryngelson | Brynteson | Brzezinski | Bube | Bublitz |
| Buchan | Buchanan | Buchanen | Bucher | Buchholz | Buchler | Buchmann | Bucholtez | Bucholtz |
| Bucholz | Buck | Buckingham | Buckley | Buckowatz | Budack | Budd | Budisch | Budke |
| Budlong | Budnick | Buechler | Bueler | Buendiger | Buerge | Buerkle | Buerskin | Buethner |
| Buettner | Bugbee | Buhr | Builte | Buising | Buisman | Bujarski | Bulau | Buldra |
| Buley | Bull | Bullard | Bullene | Bullertz | Bullis | Bullock | Bunas | Bunce |
| Bundermann | Bundy | Bungum | Bunker | Bunkowski | Bunkowski | Buntrock | Buor | Burau |
| Burbank | Burcham | Burd | Burdick | Burelback | Burgarthen | Burgenener | Burgess | Burgessf |
| Burget | Burgezss | Burggraf | Burghardt | Burghdorf | Burgin | Burgor | Burhans | Burhdorg |
| Burgin | Burgor | Burhans | Buried | Burke | Burkman | Burkness | Burley | Burlingame |
| Burman | Burmeister | Burmister | Burnap | Burnelle | Burnes | burnett | Burnham | Burns |
| Burnside | Burnstad | Burow | Burr | Burrington | Burris | Burroughs | Burrows | Burseth |
| Bursik | Bursken | Burtch | Burtis | Burton | Burzette | Busby | Busch | Buschke |
| Buschold | Buse | Buseth | Bush | Bushanic | Bushey | Bushnell | Busker | Buskerud |
| Buskey | Busko | Busmundrud | Busness | Buss | Bustul | Butcher | Butenas | Butenhoff |
| Buth | Butler | Butterfield | Butterud | Butts | Butturff | Butzke | Buxton | Buyssen |
| Bye | Byer | Byerly | Byers | Byholz | Byklum | Bylander | Bylum | Bystedt |
| Bystol | Bystrom |