Cognomen Сильян (Ciljan 
, Сильян 
) , around the world, is a very rare surname. The last name Сильян is characteristic of Kazakhstan, where it is a very rare surname, Ukraine, where it is an extremely rare surname, and Russia. Measured by absolute frequency, it is commonest in Kazakhstan, Russia, and India. Likewise, Сильян is the forename as well as the last name.