Cognomen Bunso (Bunso 
, Bongsu 
) , in the world, is quite a rare surname. The last name Bunso is characteristic of Brunei, where it is quite a rare surname, Malaysia, and United Arab Emirates, where it is a rare surname. In absolute terms, it is commonest in South-eastern Asia, particularly Malaysia, Indonesia, and Philippines. Also, Bunso is the forename as well as the last name.