| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 101 | Bressal | Celtic | Battle. | M | |
| 102 | Bret | Celtic | A Breton. | M | |
| 103 | Brett | Celtic | A Breton. | M | |
| 104 | Brian | Celtic | In use in England since the Middle Ages. Possibly connected with the Irish word for Hill thus 'He ascends.'. Also some texts define it as Strong. 10th century Brian Boru was a high king and great national hero of Ireland. | M | |
| 105 | Briano | Celtic | Variant of Brian: Brave; Virtuous. Famous Bearers: Canadian singer Brian Adams and British singer Bryan Ferry. | M | |
| 106 | Briant | Celtic | Strong; He ascends. 10th century Brian Boru was a high king and great national hero of Ireland. | M | |
| 107 | Brice | Celtic | Swift. Famous bearer: St Brice, sometimes called St. Britius, was a 5th century Bishop of Tours. | M | |
| 108 | Bricriu | Celtic | The poison tongued. | M | |
| 109 | Brien | Celtic | Variant of Brian: Brave; Virtuous. | M | |
| 110 | Brion | Celtic | Variant of Brian: Brave; Virtuous. | M | |
| 111 | Broin | Celtic | Raven. | M | |
| 112 | Bryan | Celtic | Variant of Brian: Brave; Virtuous. | M | |
| 113 | Bryant | Celtic | Strong. | M | |
| 114 | Bryce | Celtic | Swift. Famous bearer: St Brice, sometimes called St. Britius, was a 5th century Bishop of Tours. | M | |
| 115 | Bryon | Celtic | Variant of Brian: Brave; Virtuous. | M | |
| 116 | Bssil | Celtic | Battle. | M | |
| 117 | Burgess | Celtic | Citizen. | M | |
| 118 | Cachamwri | Celtic | Mythical servant of Arthur. | M | |
| 119 | Cadell | Celtic | Warring. | M | |
| 120 | Cadman | Celtic | Fighter. | M | |