Erik Knudsen (1255-1303) was a Danish duke and Drost, the youngest son of Canute, Duke of Estonia and Jadviga of Rügen and therefore a grandson of Valdemar II of Denmark and cousin of his contemporary the king Eric V of Denmark.[1] [2] In 1277 he was mentioned as a Junker. In 1279 he lived in Zealand on his farm of Skarsholm and was the chairman of the county council.[3] In 1283 he was appointed as the Drost of Denmark. In 1284 he was made the Duke of Southern Halland. He was also the lord of Skarsholm. In 1285 he was knighted by the king of Sweden. He is buried in Ringsted.