Family name Sinif (Sinif 
) , in the world, is a very rare last name. The surname Sinif is characteristic of Morocco, where it is a rare surname, Turkey, where it is an extremely rare surname, and the United States. Much less frequently, Sinif is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sinif | United States, Turkey, India, Morocco |