Family name Sinau (Sinau 
, Синау 
) , worldwide, is a rare surname. The cognomen Sinau is habitual in Malaysia, where it is a rare surname, Indonesia, and Russia, where it is an extremely rare surname. Also, Sinau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sinau | Indonesia, South Africa, Malaysia, United States, India |
| Синау | Russia |