Cognomen Dumčius (Dumčius 
) , throughout the world, is a very rare surname. The cognomen Dumčius is habitual in Northern Europe, particularly Lithuania, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Dumčius | Lithuania |
| jonas dumčius (b. 1905) |
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| stasys dumčius LT (b. 1906) |
|
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| arimantas dumčius Lithuanian politician and cardiac surgeon, LT (b. 1940) |
|
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| vytautas dumčius (b. 1963) |
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| mindaugas dumčius Lithuanian handball player, LT (b. 1995) |
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