Family name Сунага (Sunaga 
, 須永 , Sonaga 
) , worldwide, is a rare last name. The last name Сунага is characteristic of Hong Kong, where it is a rare surname, Estonia, and Japan, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Indonesia, Japan, and Brazil. Likewise, Сунага is the forename as well as the last name.