Cognomen Сыдыњ (Сыдыњ 
) , all over the world, is a rare last name. The family name Сыдыњ is habitual in Central Asia, particularly Kazakhstan, where it is quite a rare surname. Very seldom, Сыдыњ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Сыдыњ | Kazakhstan |