Surname Ясава (Yasawa 
, Ясава 
) , in all the world, is a very rare last name. The last name Ясава is characteristic of Brazil, where it is a very rare surname, Malaysia, where it is an extremely rare surname, and Peru. In absolute terms, it most frequently occurs in Brazil, Thailand, and Malaysia. Much less frequently, Ясава is the forename as well as the last name.