Cognomen Demétrio (Demetrio 
, Demetrius 
, Demétrio 
) , worldwide, is a common surname. The family name Demétrio is habitual in Mexico, where it is quite a common surname, Spain, and Jamaica. In absolute terms, it is the most numerous in Mexico, Spain, and Brazil. Likewise, Demétrio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Demetrio | Philippines, Brazil, Mexico, United States, Peru |
| Demetrius | Spain, Philippines, Brazil, Mexico, United States |
| Demétrio | Portugal, Brazil, Angola, United States, South Africa |
| Деметрий | Russia |
|
leonardo demétrio Brazilian basketball player, BR (b. 1994) |
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| clarice garcia borges demétrio BR (b. 1953) |
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| joão marco demétrio politician from Brazil, BR (b. 1964) |
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| antónio e. robalo demétrio correspondence chess player |
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| fran demétrio researcher |
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