| Blerim | Albanian for green or verdant. |
| Blerta | Albanian name meaning greenness. |
| Blerung | Albanian for the act of greening. |
| Blessing | A divine gift or holy favor. |
| Blessy | One who is blessed or fortunate. |
| Bletsung | Old English word for a blessing. |
| Blian | A name meaning soft or delicate. |
| Bliant | A name meaning a rich garment. |
| Blinda | form of belinda - beautiful |
| Bliss | A state of perfect happiness. |
| Blisse | Joy: cheer. Used from medieval times. |
| Blithe | Showing a casual, cheerful lack. |
| Bliths | A variant form of the word bliss. |
| Blix | A name meaning happy or lucky one. |
| Blodwen | A name meaning blessed flower. |
| Blodwyn | A name meaning fair or white flower. |
| Blondell | Fair-haired: blonde. Variation of the Spanish Blandina meaning flattering. |
| Blondelle | Fair-haired: blonde. Variation of the Spanish Blandina meaning flattering. |
| Blondene | Fair-haired: blonde. Variation of the Spanish Blandina meaning flattering. |
| Blood | The vital fluid of living beings. |
| Blossom | A flower or a blooming state. |
| Blostm | An archaic spelling of blossom. |
| Blount | King John' James Jurney, servant to Lady Faulconbridge. 'King Richard III' Sir James Tyrrel. 'King Richard III' Sir James Blount. |
| Blue | The color of the clear sky or sea. |
| Bluebell | A delicate bellshaped flower. |
| Bluinse | A name of uncertain origin. |
| Bluma | A flower, bloom |
| Blunt | King Henry IV, Part 1' Sir Walter Blunt. 'King Henry IV, Part 2' One of the King's party. |
| Bly | A name meaning to be cheerful. |
| Blyana | A name meaning joyful spirit. |
| Blyde | joy origin, dutch |
| Blyss | Joy: cheer. Used from medieval times. |
| Blysse | Joy: cheer. Used from medieval times. |
| Blyth | A name meaning happy or merry. |
| Blythe | A name meaning carefree and gay. |
| Bnidhish | Lyrics of classical music |
| Bo | Attractive; Nickname Made Popular by Actress Derek |
| BOADHAGH | meaning unknown |
| Boadicea | A queen of the Iceni Victory |
| Boanerges | A name meaning son of thunder. |