| Name | Meaning | Gender | Origin |
|---|
| Beta | House, Second letter of the Greek alphabet | Girl | |
| Beth | God is my oath | Girl | |
| Bethanie | House of dates, House of figs | Girl | Greek |
| Bethany | House of dates, House of figs | Girl | Greek |
| Bethel | House of God | Girl | Hebrew |
| Bethney | House of dates, House of figs | Girl | |
| Betony | | Girl | |
| Betsy | God is my oath | Girl | |
| Bette | God is my oath | Girl | |
| Bettie | God is my oath | Girl | |
| Bettina | God is my oath, Blessed | Girl | |
| Betty | God is my oath | Girl | |
| Bettye | God is my oath | Girl | |
| Beula | Married women | Girl | |
| Beulah | Married women | Girl | Hebrew |
| Beverly | Beaver Stream, Shining Ones | Girl | |
| Bevin | Fair Lady | Girl | Gaelic |
| Bibi | Bauble, Toy | Girl | French |
| Biddy | Exalted one | Girl | |
| Bijou | Jewel | Girl | French |
| Billie | Will Helmet, Protect | Unisex | |
| Bindy | Bright Serpent, Bright Linden Tree | Girl | |
| Bithia | Daughter of God | Girl | |
| Bithiah | Daughter of God | Girl | Hebrew |
| Blair | Field, Plain, Battlefield | Unisex | Scottish |
| Blanch | White | Girl | |
| Blanche | White | Girl | |
| Blanchefleur | White flower | Girl | |
| Blanda | Cherishing | Girl | Latin |
| Blanid | Little flower | Girl | Gaelic |
| Blessing | Consecration | Girl | |
| Bliss | Joy, Happiness | Unisex | |
| Blondie | Blonde | Girl | |
| Blossom | Flowers on a fruit tree, Blooming, Flowering | Girl | |
| Bluebell | American flower name | Girl | |
| Blythe | Cheerful, Happy | Unisex | |
| Bobbi | Famous | Unisex | |
| Bobbie | Famous | Girl | |
| Bobby | Famous | Unisex | |
| Bonduca | Victory | Girl | |
| Bonita | Pretty | Girl | Spanish |
| Bonnie | Bon Good | Girl | Scottish |
| Bonny | Good and Pretty | Girl | |
| Brady | Large Chested | Unisex | Irish |
| Braidy | Broad Chested | Unisex | |
| Brande | Simply Brandy | Girl | |
| Brandi | Simply Brandy | Girl | |
| Brandie | Simply Brandy | Girl | |
| Brandy | | Girl | |
| Breana | High hill, Force, Strength | Girl | Irish |
| Breann | High hill, Force, Strength | Girl | Irish |
| Breanna | High hill, Force, Strength | Girl | Irish |
| Breanne | High hill, Force, Strength | Girl | Irish |
| Breda | Exalted one | Girl | |
| Bree | Force, Strength | Girl | Irish |
| Breeda | Exalted one | Girl | Irish |
| Brenda | Sword | Girl | Irish |
| Brenna | High hill, Sword | Girl | Irish |
| Brett | A Breton | Unisex | |
| Briana | High hill, Force, Strength | Girl | |
| Brianna | High hill, Force, Strength | Girl | Irish |
| Brianne | High hill, Force, Strength | Girl | |