Cognomen Siur (Siur 
, Сюр 
) , in the world, is a rare surname. The cognomen Siur is habitual in Ukraine, where it is a rare surname, Israel, where it is a very rare surname, and Russia. Measured by absolute frequency, the name is most common in Ukraine, Russia, and India. Much less frequently, Siur is the forename as well as the last name.