Cognomen ريهم (ريهم 
, Rihm 
, Riehm 
) , all around the world, is quite a rare surname. The last name ريهم is habitual in Western Europe, particularly Germany, where it is quite a rare surname, Luxembourg, and Switzerland. Not in comparison with a country's population, it most frequently occurs in Germany, the United States, and France. Very seldom, ريهم is the forename as well as the last name.