| Men's names in English | Ainmneacha Fear i nGaeilge |
| Barclay | Parthalán |
| Barry | Barra |
| Bartlemy | Bairtliméad |
| Bartley | Beartlaidh |
| Basil | Breasal |
| Becan | Beacán |
| Benedict | Neinidict |
| Benignus / Benen | Beineán |
| Benjamin | Beiniaimin |
| Bercan | Bearchán |
| Bernard | Bearnard |
| Bertie / Ben | Beircheart |
| Boetius | Buach |
| Bonaventure | Bonaventúr |
| Bowes | Baolach |
| Bran | Bran |
| Brasil | Breasaí |
| Brendan | Brendán |
| Brian / Barney | Brian |
| Buagh | Buach |
| Women's names in English | Ainmneacha Fear i nGaeilge |
| Bab | Baibín |
| Babe | Báb |
| Barbara | Bairbre |
| Beatrice | Béatrais |
| Bessy | Brídín |
| Bella | Nábla |
| Benvon | Bean Mhumhan |
| Benvy | Bean Mhí |
| Bernadette | Bearnairdín |
| Bernice | Beirnís |
| Bessie | Eilís |
| Betty | Beití |
| Bevin | Béibhinn |
| Bidelia | Bríd |
| Birdie (Breege) | Bríd |
| Breeda ( Bride) | Bríd |
| Brenda | Breanda |
| Bridget | Bríd |
