Eric IV "plovpenning" (1216-1250) was King of Denmark (1241-50) and Son of Waldemar the Victorious and his fathers coruler from 1232. Fought the Scanian peasants who rebelled because of his hard taxes on among other things ploughs. (this gave him his epithet "ploughmoney") He also fought his brother Abel duke of Schleswig and as he negotiated a truce with him he was taken prisoner and executed.