Last name Satu (Satu 
, Saga 
, Сату 
) , in the entire world, is a common cognomen. The surname Satu is habitual in Solomon Islands, where it is quite a common surname, Norway, where it is quite a rare surname, and Philippines. Not in comparison with a country's population, it is the most numerous in Indonesia, India, and Philippines. Likewise, Satu is the forename as well as the last name.