Cognomen Цзы (Zi 
, Tzu 
, Цзы 
) , around the world, is a common last name. The family name Цзы is habitual in Myanmar, where it is quite a common surname, Algeria, and Malaysia. Not in comparison with a country's population, it is commonest in China, Myanmar, and Algeria. Also, Цзы is the forename as well as the last name.