- Bacchus
- Badillo
- Baehr
- Baez
- Baker
- Baldwin
- Ball
- Balliet
- Banda
- Barajas
- Barden
- Barragan
- Barraza
- Barrera
- Barrett
- Barrientos
- Barriga
- Barrio
- Barrios
- Barron
- Barrueta
- Barry
- Bartholome
- Bartlett
- Barton
- Basch
- Baskind
- Bass
- Bassett
- Basurto
- Batalla
- Batchelder
- Bates
- Bauchert
- Baum
- Baumgarten
- Bautista
- Bawol
- Bay
- Bayless
- Bayona
- Bazan
- Beadle
- Beakes
- Beall
- Bean
- Bear
- Beard
- Beardsley
- Beasley
- Beaton
- Beaty
- Beaver
- Becerra
- Bechtel
- Bechtlofft
- Beck
- Becker
- Beckmann
- Becknell
- Becvar
- Bedoya
- Beeman
- Beene
- Behm
- Beimborn
- Beirne
- Bejarano
- Bekkum
- Beles
- Belford
- Belgie
- Belgrave
- Bell
- Belmont
- Belmonte
- Beltran
- Benavente
- Bencomo
- Benford
- Benitez
- Benito
- Bennett
- Benson
- Benuska
- Berdion
- Berg
- Berkel
- Bermudez
- Bernal
- Bernard
- Bernet
- Berry
- Berton
- Berumen
- Best
- Betancourt
- Betts
- Bhakta
- Bibb
- Bigham
- Billingslea
- Billman
- Binkley
- Bir
- Birkelbach
- Biros
- Bissell
- Black
- Blackston
- Blackwell
- Blakely
- Blancas
- Blanch
- Blanco
- Bland
- Blankinship
- Blas
- Bleam
- Bliss
- Bloom
- Bloomer
- Bloss
- Blotts
- Blough
- Blount
- Blowe
- Bluemel
- Blythe
- Bock
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- Boetto
- Bogart
- Bokker
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- Bombela
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- Bonds
- Bone
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- Bonner
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- Booker
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- Borja
- Borjas
- Bork
- Borowsky
- Borquez
- Borrego
- Borrero
- Borret
- Borunda
- Boswell
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- Boureslan
- Boutte
- Bowden
- Bowen
- Bowers
- Bowlin
- Bowman
- Boyd
- Boydston
- Boyer
- Boykin
- Boylan
- Boyle
- Bracamonte
- Bracher
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- Bradshaw
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- Brady
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- Braun
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- Brazell
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- Brownlow
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- Bruntz
- Bryan
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- Budnovich
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- Bueno
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- Bull
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- Burgess
- Burgett
- Burgin
- Burgos
- Burke
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- Burns
- Burris
- Burrus
- Burt
- Buschdorf
- Bush
- Bustamante
- Bustamente
- Bustillos
- Bustos
- Butcher
- Butler
- Butterfield
- Byrd