- Baagøe
- Baastrup
- Bach
- Bager
- Bagge
- Baldersdatter
- Balderup
- Balle
- Ballerup
- Bang
- Barber
- Barbye
- Barends
- Barfod
- Barfred
- Barker
- Barqvist
- Bart
- Barth
- Barthram
- Barøe
- Bate
- Bathe
- Battus
- Beach
- Bech
- Beck
- Becker
- Beckmann
- Bedsted
- Behling
- Beid
- Bejer
- Bendixdatter
- Bendixen
- Bendtsdatter
- Bendtsen
- Bengtsson
- Bense
- Benson
- Bentzen
- Berbandt
- Berendtsdatter
- Berg
- Bergendahl
- Bergstein
- Bergstrøm
- Berling
- Berlips
- Berndt
- Bernhard
- Bernhoft
- Bernholt
- Berntsen
- Berntson
- Berryman
- Bertelsdatter
- Bertelsen
- Berthelsdatter
- Berthelsen
- Beth
- Beyer
- Bidstrup
- Biergrav
- Bierrum
- Bild
- Bildsøe
- Bille
- Bilsted
- Bing
- Birch
- Birkebæk
- Birkholm
- Bjerg
- Bjering
- Bjerkmann
- Bjerregaard
- Bjerring
- Bjørnsdatter
- Bjørnsen
- Blaamand
- Blangsted
- Blanxia
- Blanxius
- Blasholtz
- Bleking
- Blem
- Bloch
- Blume
- Blundell
- Blykop
- Bocon
- Boesdatter
- Boesen
- Bohn
- Bojesen
- Bolbro
- Boldt
- Böllicken
- Bolund
- Bomgaard
- Bonde
- Bondesdatter
- Bonnersen
- Borby
- Borch
- Bore
- Borg
- Borge
- Borgen
- Borig
- Bornholm
- Borreby
- Borringholm
- Bosen
- Boss
- Böttzauw
- Boutwell
- Bovee
- Boye
- Boyesen
- Brammer
- Brandenborg
- Brandrup
- Brandsgaard
- Brandstrup
- Brandt
- Brase
- Brask
- Brathagen
- Braun
- Braunerhielm
- Bremer
- Brenton
- Bretwise
- Breuss
- Brinck
- Brix
- Broberg
- Broch
- Brock
- Brugman
- Brugmann
- Bruhn
- Brun
- Brunnström
- Brunow
- Bruun
- Brøchner
- Brødsgaard
- Brøndum
- Buch
- Buchholtz
- Buck
- Buckingham
- Bugge
- Buggenhagen
- Bull
- Bunn
- Burmeister
- Busch
- Büsing
- Busk
- Busse
- Buzick
- Byder
- Byell
- Byington
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- Bærildsen
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- Bøe
- Bønnich
- Børgesen