Surname Ianou (Яну 
, Ianou 
) , globally, is a very rare last name. The surname Ianou is characteristic of Belarus, where it is a very rare surname, Greece, and Ukraine, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in Russia, Belarus, and Greece. Very seldom, Ianou is the forename as well as the last name.