Last name Slas (Slas 
, سلاس 
) , throughout the world, is quite a rare surname. The surname Slas is habitual in Ethiopia, where it is quite a rare surname, Morocco, where it is a rare surname, and Algeria, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Ethiopia, Morocco, and Indonesia. Very seldom, Slas is the forename as well as the last name.