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Last name Cio (Cio
) , in all the world, is quite a rare surname. The surname Cio is habitual in Portugal, where it is a rare surname, Angola, and Morocco. Measured by absolute frequency, it is the most numerous in Indonesia, Angola, and Portugal. Likewise, Cio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cio | Portugal, Angola, Italy, Indonesia, Morocco |