Cognomen Tiuliu (Тюлю 
, Tiuliu 
) , worldwide, is a rare last name. The last name Tiuliu is habitual in Eastern Europe, particularly Moldova, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Ukraine, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Eastern Europe, particularly Moldova, Russia, and Ukraine. Very seldom, Tiuliu is the forename as well as the last name.