All around the world, Cassis (Cassia 
, Cassis 
, Kasiso 
) is a common feminine given name. The forename Cassis is characteristic of Brazil, where it is quite a common girly name, Angola, where it is quite a rare female name, and Portugal, where it is quite a rare predominantly girly, but very infrequently male name. In absolute terms, it is the most numerous in Brazil, Angola, and the United States. Very seldom, Cassis is the last name as well as the forename.