Surname Fridu (Friedegund 
, Fridolf 
, Frideborg ) , across the world, is a rare family name. The cognomen Fridu is characteristic of Northern Europe, particularly Denmark, where it is quite a rare surname, Sweden, and Estonia, where it is a rare surname. Measured by absolute frequency, the name is most common in Sweden, Denmark, and Australia. Also, Fridu is the forename as well as the last name.