Cognomen Demo (Demo 
, Daemon 
, 德模 
) , in the world, is a common surname. The last name Demo is habitual in Albania, where it is quite a common surname, Croatia, where it is quite a rare surname, and Slovakia. Not in comparison with a country's population, it is commonest in Egypt, Myanmar, and the United States. Likewise, Demo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Demo | Egypt, Myanmar, Italy, Ethiopia, United States |
| Daemon | Philippines, Brazil, Myanmar, Indonesia, United States |
| 德模 | China |
| Демо | Kyrgyzstan, Russia, Ukraine |
| dan demo person, CBDB ID = 368523 (b. 1700) |
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| kuai demo Qing dynasty person CBDB = 90678 (b. 1816) |
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antonio demo Italian-American priest, IT (b. 1870) |
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| anthony demo American politician – Minnesota -House 1879-80 (District 1); House 1891-92 (District 1), US (b. 1835) |
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| carlo demo Italian librarian (1865-1933), IT (b. 1865) |
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pavel demo Czech physicist, CZ (b. 1953) |
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| ondrej demo (b. 1927) |
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| milan demo (b. 1931) |
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| pedro demo Brazilian sociologist (b. 1941) |
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demo taped singer-songwriter from Atlanta, Georgia, US (b. 1998) |
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| karine de demo French actress, FR (b. 1953) |
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| demo mura Italian actor, IT (b. 1962) |
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| roberto demo Italian singer, IT (b. 1965) |
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| david h. demo (b. 1955) |
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| igor demo Slovak football player, SK (b. 1975) |
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