Joachim Zachris Duncker (12 November 1774 – 6 July 1809) was a Swedish soldier born in Ristiina in Savonia. In 1789 Duncker obtained the rank of 2nd Lieutenant in the Savonia ranger regiment. He fought in the 1790 war against Russia and proved his valor at the Battle of Perttimäki 19 May. In 1804 Duncker was promoted to Captain. Duncker was buried next to Umeå church by the Russians that gave him a full honour guard. He lies buried together with a Russian cossack chief. In 1897 a memorial was erected on the spot where the grave was assumed to be. * Duncker's monument at Hörnefors. *