Last name Sinin (Sinin 
, Синин 
) , in the world, is quite a rare family name. The cognomen Sinin is characteristic of Malaysia, where it is quite a rare surname, Singapore, where it is a rare surname, and Sudan. Not in comparison with a country's population, it is the most numerous in Indonesia, Malaysia, and Russia. Very seldom, Sinin is the forename as well as the last name.