Surname Рияхи (Riahi 
, Рияхи 
) , globally, is a common family name. The last name Рияхи is characteristic of Tunisia, where it is a common surname, Morocco, where it is quite a rare surname, and Qatar. In absolute terms, it most frequently occurs in Tunisia, Morocco, and France. Very seldom, Рияхи is the forename as well as the last name.