Cognomen Адо (Ado 
, Адо 
, Hadot 
) , globally, is a widespread surname. The cognomen Адо is characteristic of Mongolia, where it is a common surname, Nigeria, where it is quite a common surname, and Bosnia and Herzegovina, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Nigeria, Mongolia, and Philippines. Also, Адо is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ado | Nigeria, Ethiopia, Philippines, Democratic Republic of the Congo, Mongolia |
| Адо | Russia, Armenia, Estonia |
| Hadot | India, Philippines, France |
| игорь адо Russian mathematician, RU (b. 1910) |
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| адо, андрей дмитриевич RU (b. 1909) |
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| адо, анатолий васильевич Russian historian, RU (b. 1928) |
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| улуро адо Soviet writer and poet, RU (b. 1938) |
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