Surname Wasu (Wasu 
, วสุ , วาสุ ) , throughout the world, is quite a rare cognomen. The cognomen Wasu is characteristic of Ethiopia, where it is quite a rare surname, Malaysia, where it is a rare surname, and Cameroon. Measured by absolute frequency, it is the most numerous in Ethiopia, India, and Nigeria. More prevalently, Wasu is the forename as well as the last name.