Around the globe, Sys (Sys 
, Сис 
, Сыс 
) is a rare unisex first name. The given name Sys is habitual in Denmark, where it is a rare girly name, Bulgaria, and Saudi Arabia, where it is a very rare masculine name. In absolute terms, it is the most numerous in Indonesia, Saudi Arabia, and Denmark. Likewise, Sys is the last name as well as the forename.