Cognomen Tsitsin (齐钦 
, Tsitsin 
, Цицин 
) , in all the world, is a rare last name. The cognomen Tsitsin is habitual in Eastern Europe, particularly Russia, where it is a rare surname, Belarus, where it is a very rare surname, and Ukraine. Not in comparison with a country's population, it is commonest in Russia, China, and Belarus. Much less frequently, Tsitsin is the forename as well as the last name.