Cognomen Brynan (Brynan 
) , globally, is a very rare last name. The surname Brynan is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. Likewise, Brynan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Brynan | Philippines, United States |
|
tod brynan American baseball player, US (b. 1863) |
|
| william mortimer brynan IN (b. 1831) |
|