| Barden | Minstrel: a singer-poet. |
| Barra | A name meaning a person from the hill. |
| Barry | A fairhaired person or spear. |
| Bary | A spearman or marksman |
| Beacan | An Irish name meaning little radiant one. |
| Bearacb | A name meaning a brave warrior. |
| Bearcban | A name meaning white bear. |
| Beatha | A name meaning life or living. |
| Becan | Derived from a small creature. |
| Bendigeidfran | Blessed raven of Welsh myth |
| Berit | A bright and glorious strength. |
| Betha | A house or a place of dwelling. |
| Bevan | Son of the youth or warrior. |
| Bevyn | A variant of the name Beverly. |
| Birgit | Splendid or strong |
| Birkita | A strong and resilient woman. |
| Birte | A name meaning bright or famous. |
| Blainey | A name meaning thin or lean. |
| Blair | From the plain lands |
| Blane | A name meaning thin or slender. |
| Blayne | A name meaning thin or slender person. |
| Blayney | A name meaning a thin or lean person. |
| BOADHAGH | meaning unknown |
| Body | Refers to the physical structure. |
| Bowen | Son of the noble descendant. |
| Bowyn | A variant of the name Bowen. |
| Boynton | From tbe white river |
| Brangaine | Character from Isolde legend |
| Brarn | A variant of the name Brian. |
| Brasil | Derived from the red wood tree. |
| Brazil | Named after the red dye wood tree. |
| Breanainn | Derived from a word for a prince. |
| Breanna | A name meaning noble or virtuous. |
| Breckin | Meaning a freckled or small one. |
| Bredon | Derived from a hill or mount. |
| Breeda | An Irish name meaning exalted. |
| Brend | A name meaning sword blade. |
| Brendt | Hilltop. Variant of Brent. |
| Brendyn | A name meaning hill or sword. |
| Brent | From the hill; Hill top; A Steep Climb; From the steep hill |