| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 641 | Bordin | English | Variant of Borden: Boar's home. | M | |
| 642 | Bordon | English | Variant of Borden: Boar's home. | M | |
| 643 | Bort | English | Fortified. | M | |
| 644 | Boston | English | A place name. | M | |
| 645 | Bosworth | English | Lives at the cattle enclosure. | M | |
| 646 | Botewolf | English | Herald wolf. | M | |
| 647 | Bothe | English | Lives in a hut. | M | |
| 648 | Botolf | English | Wolf. | M | |
| 649 | Botolph | English | Variant of Botolf: Wolf. | M | |
| 650 | Botulf | English | Variant of Botolf: Wolf. | M | |
| 651 | Botwolf | English | Herald wolf. | M | |
| 652 | Bourke | English | Fortified hill. See also Berkley. | M | |
| 653 | Bourn | English | From the brook. | M | |
| 654 | Bourne | English | From the brook. | M | |
| 655 | Boy | English | Boy. | M | |
| 656 | Boyce | English | Lives near the wood. | M | |
| 657 | Bple | English | Cup bearer. | M | |
| 658 | Brad | English | Diminutive of Bradley: Broad clearing in the wood. From a surname and place name based on the Old English words for broad clearing and broad wood. Famous Bearer: Movie star Brad (Bradley) Pitt. | M | |
| 659 | Bradan | English | From the broad valley. | M | |
| 660 | Bradbourne | English | From the broad brook. | M | |