Cognomen Сера (Sera 
, Serra , Cera ) , in all the world, is a widespread surname. The family name Сера is characteristic of Southern Europe, particularly Portugal, where it is a common surname, San Marino, where it is quite a common surname, and Italy (explore the name in all countries). Measured by absolute frequency, it is commonest in Brazil, Italy, and Spain. Very seldom, Сера is the forename as well as the last name.