Surname Sunsun (Sunsun 
, ซันซัน 
) , in all the world, is a rare family name. The last name Sunsun is habitual in Hong Kong, where it is a rare surname, Myanmar, and Indonesia, where it is a very rare surname. In absolute terms, the name is most common in Myanmar, Indonesia, and China. More prevalently, Sunsun is the forename as well as the last name.