Last name Caulín (Caulín 
) , in the world, is an extremely rare family name. The surname Caulín is characteristic of Southern Europe, particularly Spain, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Caulín | Spain |
| antonio caulín (1719-1802) (b. 1719) |
|
|
| mariano caulín Uruguayan rower, UY (b. 1938) |
|