Dumčius is a Lithuanian surname.[https://ekalba.lt/pavardziu-duomenu-baze/DUM%C4%8CIUS?paieska=Dum%C4%8Dius&i=2e08cd7f-8e98-46a5-add8-b4dd5b0b440d DUMČIUS] Notable people with this surname include:
(born 1940), Lithuanian cardiac surgeon, politician and public figure Mindaugas Dumčius (born 1995), Lithuanian handball player
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