Cognomen Kso (Kso 
) , across the world, is quite a rare last name. The cognomen Kso is habitual in Myanmar, where it is quite a rare surname, Algeria, where it is a rare surname, and Indonesia, where it is a very rare surname. In absolute terms, the name is most common in Myanmar, India, and Indonesia. Likewise, Kso is the forename as well as the last name.