Last name ريهو (Riho 
, Sayashi 
, ريهو) , in the world, is a rare cognomen. The cognomen ريهو is habitual in Czechia, where it is a rare surname, Hungary, and Morocco. Not in comparison with a country's population, it most frequently occurs in Morocco, China, and India. More prevalently, ريهو is the forename as well as the last name.