Cognomen הארו (Harro 
, הארו 
) , all around the world, is a rare last name. The surname הארו is habitual in Estonia, where it is quite a rare surname, Morocco, where it is a rare surname, and Australia. Not in comparison with a country's population, this name is the most popular in India, the United States, and Indonesia. More prevalently, הארו is the forename as well as the last name.