Cognomen Sadii (Sadii 
, Садии 
, Садий 
) , worldwide, is a rare surname. The surname Sadii is characteristic of Saudi Arabia, where it is a rare surname, Morocco, and Algeria, where it is a very rare surname. In absolute terms, this name is the most popular in Saudi Arabia, Russia, and Morocco. Much less frequently, Sadii is the forename as well as the last name.