| Name | Meaning | Gender | Origin |
|---|
| Bill | comic-strip Bill the Cat | Male | English |
| Black | Dark | Male | English |
| Blaise | to lisp, stammer | Male | |
| Bob | bright, famous | Male | English |
| Bones | after doctor in Star Trek | Unisex | |
| Bradley | broad meadow | Male | English |
| Brian | strong | Male | Irish |
| Broderick | son of Roderick, from the broad ridge | Male | Norse |
| Brown | colour | Male | Color |
| Bryce | Son of a nobleman
| Male | English |
| Buckbeak | | Unisex | |
| Carrow | | Unisex | Hebrew |
| Cassandra | prophet of doom | Female | Greek |
| Cedric | Battle leader
| Male | Celtic |
| Chang | smooth, free, unhindered | Male | Chinese |
| Charity | Affection, Charity, Brotherly Love | Female | Latin |
| Charlie | a man: variant of Carl.
| Male | English |
| Cho | butterfly | Unisex | |
| Colin | Strong and virile; victorious army; youth, child, victor | Male | English |
| Cornelius | horn | Male | Latin |
| Crookshanks | Hermione's cat in the Harry Potter books | Unisex | |
| Crookshanks | | Unisex | Hebrew |
| Cuthbert | famous, brilliant | Male | English |
| Daphne | laurel, bay tree, victory | Female | Greek |
| Davey | Beloved | Unisex | English |