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Family name リオ (Rio , Lio , リオ ) , in all the world, is a widespread last name. The last name リオ is characteristic of Macao, where it is a common surname, Malaysia, where it is quite a common surname, and Portugal (explore the name in all countries). Measured by absolute frequency, the name is most common in Indonesia, Japan, and Philippines. Also, リオ is the forename as well as the last name.