Last name Sinih (Sinih 
, Синих 
) , in the entire world, is a rare family name. The cognomen Sinih is habitual in Russia, where it is a very rare surname, Indonesia, and Kyrgyzstan. Not in comparison with a country's population, this name is the most popular in India, Russia, and Indonesia. Very seldom, Sinih is the forename as well as the last name.