| Name | Meaning | Gender | Origin |
|---|
| Ahern | Lord of horses | Boy | Irish |
| Aindreas | Manly | Boy | Irish |
| Alpin | Attractive, Fair, White | Boy | Irish |
| Aonghus | Strength, One Choice | Unisex | Irish |
| Arlan | Pledge, Oath | Boy | Irish |
| Arland | Pledge | Boy | Irish |
| Arlen | Pledge | Boy | Irish |
| Arlin | Pledge, Oath | Boy | Irish |
| Athdar | From the Oak tree ford | Boy | Irish |
| Baird | Poet | Boy | Irish |
| Ballinamore | Mouth of the big ford | Boy | Irish |
| Ballinderry | Town of the Oak wood | Boy | Irish |
| Barry | Marksman | Boy | Irish |
| Blaine | Slender, Thin | Boy | Irish |
| Blane | Slender, Thin | Boy | Irish |
| Blaney | Slender, Thin | Boy | Irish |
| Blayne | Slender, Thin | Boy | Irish |
| Braden | Descendant of Braden, | Boy | Irish |
| Brady | Large Chested | Unisex | Irish |
| Breac | Speckled | Boy | Irish |
| Bren | Little Raven | Boy | Irish |
| Brendan | Little Raven | Boy | Irish |
| Brendanus | Prince | Boy | Irish |
| Brendis | Little Raven | Boy | Irish |
| Brennan | Little Drop, Prince | Boy | Irish |
| Brianus | High Hill | Boy | Irish |
| Broderic | Son of the famous ruler | Boy | Irish |
| Broderick | Son of the famous ruler | Boy | Irish |
| Brodric | Son of the famous ruler | Boy | Irish |
| Brodrick | Son of the famous ruler | Boy | Irish |
| Brody | Muddy place, Ditch | Boy | Irish |
| Brogan | Descendant of Brogan, | Unisex | Irish |
| Bryan | High hill | Boy | Irish |
| Bryant | High hill | Boy | Irish |
| Bryant | Virtuous | Boy | Irish |
| Burney | Bear | Boy | Irish |
| Byrne | Raven | Boy | Irish |