Cognomen Rafu (Rafu 
, Rough 
) , around the world, is quite a rare family name. The cognomen Rafu is characteristic of Isle of Man, where it is quite a common surname, the United Kingdom, where it is quite a rare surname, and Australia, where it is a rare surname. In absolute terms, the name is most common in the United States, the United Kingdom, and Indonesia. Likewise, Rafu is the forename as well as the last name.