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Cognomen Diao (Diao
, 迪奥
, دياو) , throughout the world, is a widespread last name. The surname Diao is characteristic of Senegal, where it is a common surname, Aland Islands, where it is quite a common surname, and Cayman Islands. Not in comparison with a country's population, the name is most common in China, Senegal, and Philippines. Much less frequently, Diao is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Diao | Philippines, Senegal, Burkina Faso, Taiwan, China |
| 迪奥 | China |
| Диао | Russia |