Surname Tsoun (Цун 
, Tsoun 
) , all around the world, is a rare last name. The family name Tsoun is habitual in the Democratic Republic of the Congo, where it is a rare surname, Kazakhstan, and Kyrgyzstan, where it is a very rare surname. Not in comparison with a country's population, the name is most common in the Democratic Republic of the Congo, Kazakhstan, and Russia. Very seldom, Tsoun is the forename as well as the last name.