Cognomen Oukan (Укан 
, Oukan 
) , in the world, is a rare surname. The surname Oukan is characteristic of Azerbaijan, where it is quite a rare surname, Syria, where it is a rare surname, and Ukraine, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Azerbaijan, Syria, and Russia. Very seldom, Oukan is the forename as well as the last name.