| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 101 | Beanon | Irish | Good. | M | |
| 102 | Bearach | Irish | Spearlike. | M | |
| 103 | Bearchan | Irish | Variant of Bearach: Spearlike. | M | |
| 104 | Beartlaidh | Irish | From Bart's meadow. | M | |
| 105 | Bec | Irish | Diminutive of Beacan: Small. | M | |
| 106 | Becan | Irish | Variant of Beacan: Small. | M | |
| 107 | Behellagh | Irish | Variant of Baothghalach: Foolish pride. | M | |
| 108 | Beinean | Irish | Variant of Beanon: Good. | M | |
| 109 | Beineon | Irish | Variant of Beanon: Good. | M | |
| 110 | Beircheart | Irish | Shining army. | M | |
| 111 | Benen | Irish | Kind. | M | |
| 112 | Beolagh | Irish | Foolish pride. | M | |
| 113 | Bercnan | Irish | Variant of Bearach: Spearlike. | M | |
| 114 | Bergin | Irish | Variant of Bearach: Spearlike. | M | |
| 115 | Berk | Irish | The birch tree meadow. Also see Barclay and Burke. | M | |
| 116 | Berke | Irish | The birch tree meadow. Also see Barclay and Burke. | M | |
| 117 | Berkeley | Irish | The birch tree meadow. Also see Barclay and Burke. | M | |
| 118 | Berkley | Irish | The birch tree meadow. Also see Barclay and Burke. | M | |
| 119 | Binean | Irish | Variant of Beanon: Good. | M | |
| 120 | Birr | Irish | From Birr. | M | |