All around the world, Brian Frederick (Brian Frederick 
) is a very rare boy's first name. The forename Brian Frederick is characteristic of Northern Europe, particularly the United Kingdom, where it is a very rare masculine name. Much less frequently, Brian Frederick is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Brian Frederick | Spain, Philippines, United States, Chile, United Kingdom |
| brian frederick kensley South African zoologist (1944-2004), ZA (b. 1944) |
|