Surname Коан (Koan 
, Kinsai 
, Коан 
) , globally, is quite a rare last name. The family name Коан is characteristic of Malaysia, where it is quite a rare surname, Indonesia, where it is a rare surname, and Saudi Arabia, where it is a very rare surname. Measured by absolute frequency, the name is most common in Malaysia, Indonesia, and the United States. More frequently, Коан is the forename as well as the last name.