Cognomen Риаши (Riashi 
, Риаши 
) , around the globe, is a rare family name. The cognomen Риаши is characteristic of Lebanon, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Australia, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Lebanon, the United States, and Australia. Very seldom, Риаши is the forename as well as the last name.