Family name Reou (Reou 
, Реу 
, Рэу ) , worldwide, is a rare cognomen. The last name Reou is habitual in Ukraine, where it is a rare surname, Russia, and Kazakhstan, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Russia, Ukraine, and the United States. Very seldom, Reou is the forename as well as the last name.