Last name سيريو (Sirio 
, Serio , Sejro 
) , in the entire world, is a common surname. The cognomen سيريو is habitual in Italy, where it is quite a common surname, Argentina, where it is quite a rare surname, and Uruguay. Not in comparison with a country's population, it is the most numerous in Italy, the United States, and Brazil. Likewise, سيريو is the forename as well as the last name.