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, Burkina Faso, China, Taiwan, Senegal |
| 迪奥 | China |
| Диао | Russia |
| diao xie Eastern Jin dynasty person CBDB = 11929 (b. 250) |
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| diao yong Northern Wei person CBDB=11934 (b. 390) |
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| diao zun Northern Wei person CBDB = 11935 (b. 441) |
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| diao kan Southern Tang person CBDB = 3842 (b. 945) |
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| diao shi Song dynasty person CBDB = 5311 (b. 968) |
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| diao zhan Song dynasty person CBDB = 1634 (b. 971) |
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| diao yue Song dynasty person CBDB = 1635 (b. 1004) |
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| diao a Song dynasty person CBDB = 11940 (b. 1005) |
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| diao mou Song dynasty person CBDB = 45771 (b. 1005) |
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| diao bao Qing dynasty person CBDB = 34898 (b. 1603) |
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| diao kechong Qing dynasty person CBDB = 70728 (b. 1635) |
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| diao chengzu Qing dynasty person CBDB = 56814 (b. 1672) |
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| diao yucheng Qing dynasty person CBDB = 68043 (b. 1729) |
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salif diao Senegalese footballer, SN (b. 1977) |
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| diao wenyuan Chinese table tennis player (b. 1943) |
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