- Baars
- Babal
- Babbitt
- Babcock
- Bachelder
- Bachhuber
- Bachman
- Backman
- Backstrand
- Backstrom
- Backus
- Bacon
- Bacso
- Baden
- Baderman
- Badurina
- Bae
- Baer
- Baese
- Bagby
- Baggenstos
- Bagon
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- Bailey
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- Baisley
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- Baker
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- Ball
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- Balo
- Balske
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- Bancroft
- Banerjee
- Banfe
- Banford
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- Bangura
- Banh
- Banitt
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- Barnett
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- Barnhart
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- Barton
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- Basaraba
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- Bashor
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- Bass
- Bassett
- Bastian
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- Bates-Sherman
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- Batra
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- Battles
- Batts
- Baucke
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- Baumeister
- Baumgardner
- Baumgartner
- Baune
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- Baxter
- Bay
- Bayern
- Bayley
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- Beach
- Beadling
- Beadnell
- Beal
- Beall
- Beals
- Beam
- Beaman
- Beard
- Beardsley
- Bearman
- Beaton
- Beattie
- Beatty
- Beaty
- Beauchamp
- Beaudoin
- Beaver
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- Beazle
- Bebb
- Bebek
- Bec
- Becerril
- Bechtol
- Bechtold
- Beck
- Becker
- Beckerman
- Beckers
- Beckett
- Beckley
- Beckmann
- Beckwith
- Bedford
- Bedlion
- Beebe
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- Beggs
- Begin
- Behnke
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- Beillard
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- Beistel
- Bekooy
- Bela
- Belair
- Belasco
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- Beliveau
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- Bellcoff
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- Belott
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- Belusko
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- Benhard
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- Benz
- Benzinger
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- Berg
- Bergemann
- Bergendahl
- Berger
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- Bergland
- Bergman
- Bergmann
- Bergquist
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- Bernard
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- Berney
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- Bevis
- Bey
- Bey-Roode
- Beydler
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- Beyerle
- Bibles
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- Bigcraft
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- Billingsley
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- Bilyeu
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- Bjornseth
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- Black
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- Blair
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- Blakely
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- Blank
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- Blechschmidt
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- Block
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- Blodgett
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- Bloomfield
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- Bluestone
- Blum
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- Boardman
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- Boehm
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- Bolotow
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- Borho
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- Botts
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- Bowe
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- Bowles
- Bowman
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- Box
- Boxer
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- Brinlee
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- Brisack
- Brisbane
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- Bristah
- Britain
- Britton
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- Broberg
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- Broderick
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- Broyles
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- Bruhn
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- Brunelle
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- Bruno
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- Brusie
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- Brusseau
- Bruton
- Bryan
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- Buchholz
- Buck
- Buckle
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- Buczkowski
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- Buffo
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- Bullock
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- Bunn
- Bunnell
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- Burchfield
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- Burchkhard
- Burdick
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- Burger
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- Burkart
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- Burlingame
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- Burton
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- Buscher
- Bush
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- Bushong
- Buskirk
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- Butzin
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- Buzan
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- Bynum
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- Byre
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- Byrnes
- Bysmans