Demetrius Constantine Dounis, Greek violinist and mandolin player (b. 1886)
Demetrius Constantine Dounis (also Demetrios), also known as D. C. Dounis (Greek: Δημήτριος Κωνσταντίνος Δούνης; c.1886 to 1894 – August 13, 1954), was an influential teacher of violin and string instrument technique, as well as violinist, violist, and mandolin player.