| Blitha | Dark-haired joy |
| Blocc | Dark-haired fortress |
| Blocca | Dark-haired stronghold |
| Bobba | Dark-haired rebel |
| Bobe | Dark-haired warrior |
| Bocca | Dark-haired mouth |
| Bodiccius | Dark-haired noble |
| Bodkin | Dark-haired dagger |
| Bodvoci | Dark-haired battle |
| Boga | Dark-haired god |
| Bonson | Son of a good or kind man. |
| Book | Scribe or Bookbinder |
| Books | Scribe or Bookbinder |
| Bosa | Make it Strong or Firm |
| Bosel | A name of Old English origin. |
| Botolphe | Derived from French, meaning 'good fortune' or 'lucky' |
| Boudibiua | Of French origin, possibly meaning 'good gift' or 'blessed gift' |
| Bracca | Italian surname, possibly meaning 'from the brook' or 'dweller by the brook' |
| Brachtmar | Possibly a variant of 'Brachtmar,' a German surname meaning 'from the marsh' |
| Braddlee | English surname, likely derived from 'Bridle' or 'Bridley,' meaning 'bridge' |
| Braenci | Possibly a variant of 'Braenche,' a French surname meaning 'from the brook' |
| Brancu | Romanian surname, possibly meaning 'from the branch' or 'dweller by the branch' |
| Brandeban | German surname, likely meaning 'from the Brandenburg region' |
| Brandeharz | German surname, possibly meaning 'from the Brandenburg forest' |
| Brandelz | German surname, likely meaning 'from the Brandenburg region' |
| Brangu | Possibly a variant of 'Brangue,' a French surname meaning 'from the brook' |
| Brangui | Possibly a variant of 'Brangue,' a French surname meaning 'from the brook' |
| Branhui | Possibly a variant of 'Brangue,' a French surname meaning 'from the brook' |
| Branud | Possibly a variant of 'Brangue,' a French surname meaning 'from the brook' |
| Branui | Possibly a variant of 'Brangue,' a French surname meaning 'from the brook' |
| Brasias | Possibly a variant of 'Brasias,' a French surname meaning 'from the brook' |
| Brassias | Possibly a variant of 'Brasias,' a French surname meaning 'from the brook' |
| Brastias | Possibly a variant of 'Brasias,' a French surname meaning 'from the brook' |
| Bravecci | Italian surname, likely meaning 'from the brave' or 'dweller by the brave' |
| Bravicci | Italian surname, possibly meaning 'from the brave' or 'dweller by the brave' |
| Brax | Brock's or Bracca's Town |
| Brayn | Powerful; Strong |
| Breahha | Possibly derived from 'bre' meaning 'hill' or 'high place' |
| Breca | Possibly derived from 'bre' meaning 'hill' or 'high place' |
| Breid | Derived from 'breid' meaning 'exalted' or 'noble' |