Last name Yassyn (Yassyn 
, Яссин 
) , throughout the world, is a rare cognomen. The last name Yassyn is habitual in Belarus, where it is a rare surname, Morocco, and Egypt, where it is a very rare surname. In absolute terms, it is the most numerous in Egypt, Morocco, and Russia. Also, Yassyn is the forename as well as the last name.