Surname Claudiu (Claudiu 
, Клавдий 
, Клавдій 
) , all over the world, is a common last name. The surname Claudiu is characteristic of Romania, where it is quite a common surname, Cyprus, where it is quite a rare surname, and Austria, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Romania, Spain, and Italy. More frequently, Claudiu is the forename as well as the last name.