Surname Баню (Banyu 
, Banju 
, Баню 
) , across the world, is quite a rare family name. The last name Баню is characteristic of Bulgaria, where it is quite a rare surname, Indonesia, where it is a rare surname, and Japan. Measured by absolute frequency, this name is the most popular in Indonesia, India, and Japan. Also, Баню is the forename as well as the last name.