Cognomen Tsytsak (Цицак 
, Tsytsak 
, Цыцак 
) , in all the world, is a rare family name. The family name Tsytsak is habitual in Eastern Europe, particularly Ukraine, where it is a rare surname, Belarus, and Poland, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Eastern Europe, particularly Ukraine, Russia, and Belarus.