Last name 雲丹 (Uni 
, 雲丹 
) , all over the world, is a common family name. The last name 雲丹 is characteristic of Malaysia, where it is quite a common surname, Colombia, where it is quite a rare surname, and Indonesia. Not in comparison with a country's population, this name is the most popular in India, Malaysia, and Indonesia. Likewise, 雲丹 is the forename as well as the last name.