Diwanus

thumb|300px|Map of Prussian clans in the 13th century

Diwanus (also Diwan, Diwane) was the leader (capitaneus) of the Bartians, one of the Prussian clans, during the Great Prussian Uprising (1260–1274) against the Teutonic Knights. He was son of Kleckis (Old Prussian: bear) and therefore is sometimes referred to by a nickname derived from the word bear.