Family name Demian (Demian 
, Демьян 
, Дем'Ян , among others...) , all around the world, is a common surname. The family name Demian is habitual in Moldova, where it is quite a common surname, Romania, and Lebanon. Measured by absolute frequency, it most frequently occurs in Romania, Egypt, and Nigeria. Also, Demian is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Demian | Romania, Egypt, Lebanon, Nigeria, Argentina |
| Демьян, Демян | Kazakhstan, Russia, Belarus, Bulgaria, Ukraine |
| Дем'Ян | Ukraine |
| Демиан | Russia |
| ján demian Hungarian Lutheran pastor, SK (b. 1714) |
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| ján ondrej demian Slovak clerk and poet (1734-1799), SK (b. 1732) |
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| cyrill demian Austrian pipe organ builder, AT (b. 1772) |
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| johann andreas demian SK (b. 1765) |
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| baltazár demian SK (b. 1803) |
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| atanasiu demian RO (b. 1860) |
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| ioan demian Romanian lawyer, RO (b. 1878) |
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iosif demian Romanian cinematographer, RO (b. 1941) |
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| anastase demian Romanian painter, RO (b. 1899) |
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| aron demian RO (b. 1891) |
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lars demian Swedish singer, songwriter and guitarist, SE (b. 1957) |
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| wilhelm demian RO (b. 1910) |
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| valer-vasile demian correspondence chess player (1934-2018) (b. 1934) |
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| iarina demian actor, RO (b. 1938) |
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| horia demian Romanian basketball player, RO (b. 1942) |
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