Surname リオウ (Liow 
, リオウ 
) , in the world, is quite a common last name. The last name リオウ is characteristic of Singapore, where it is quite a common surname, Malaysia, where it is quite a rare surname, and Australia, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in South-eastern Asia, particularly Malaysia, Indonesia, and Singapore. Likewise, リオウ is the forename as well as the last name.