Surname Силвиу (Silviu 
, Силвиу 
, Sylvyu ) , throughout the world, is a common cognomen. The cognomen Силвиу is habitual in Romania, where it is quite a common surname, Moldova, where it is quite a rare surname, and Italy, where it is a rare surname. Not in comparison with a country's population, the name is most common in Romania, Italy, and Afghanistan. More frequently, Силвиу is the forename as well as the last name.