Surname ควัน (Smak 
, Smow 
, Smos 
) , around the globe, is quite a rare cognomen. The cognomen ควัน is habitual in Netherlands, where it is a rare surname, Poland, and Latvia. Measured by absolute frequency, this name is the most popular in Poland, Egypt, and Netherlands. Likewise, ควัน is the forename as well as the last name.