| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 41 | Bain | Gaelic | Lives near the clear stream. | M | |
| 42 | Bainbridge | Gaelic | Lives by the bridge over the stream. | M | |
| 43 | Bainhrydge | Gaelic | Lives by the bridge over the stream. | M | |
| 44 | Baird | Gaelic | Poet. | M | |
| 45 | Balfor | Gaelic | Variant of Balfour: From the grazing land. | M | |
| 46 | Balfore | Gaelic | Variant of Balfour: From the grazing land. | M | |
| 47 | Balfour | Gaelic | From the grazing land. | M | |
| 48 | Banain | Gaelic | Little blond one. | M | |
| 49 | Banning | Gaelic | Little blond one. | M | |
| 50 | Baran | Gaelic | Noble warrior. | M | |
| 51 | Bard | Gaelic | Poet. | M | |
| 52 | Barra | Gaelic | Spear. | M | |
| 53 | Barry | Gaelic | Spear. | M | |
| 54 | Barrymore | Gaelic | Variant of Barry: Pointed object. | M | |
| 55 | Batair | Gaelic | Strong warrior. | M | |
| 56 | Beagan | Gaelic | Little one. | M | |
| 57 | Beagen | Gaelic | Little one. | M | |
| 58 | Beagin | Gaelic | Variant of Beagan: Small child. | M | |
| 59 | Bealantin | Gaelic | Gaelic form of Ballantine. | M | |
| 60 | Bearach | Gaelic | Spear. | M | |