Cognomen Kuian (奎安 
, Kuian 
, Куян 
) , worldwide, is quite a rare last name. The cognomen Kuian is characteristic of Ukraine, where it is quite a rare surname, Russia, where it is a rare surname, and Kazakhstan. Measured by absolute frequency, the name is most common in Ukraine, Russia, and China. Also, Kuian is the forename as well as the last name.