Over what time period did the dynasty of which Eric Christoffersen of Denmark was a member provide the Kings of Denmark?
Eric Christoffersen of Denmark Eric Christoffersen (c. 1307 – c. 1332) (Danish: "Erik Christoffersen" ) was king of Denmark from 1321 until his death, jointly with his father, King Christopher II. He was a member of the House of Estridsen. In Danish, he is called "Erik, udvalgt Konge."
Van Amstel (family) The Van Aemstel or Van Amstel dynasty (Dutch: "Heren van Amstel" , also spelled "Heeren van Aemstel" or "Heren van Aemstel") was a major lordly dynasty in the medieval Netherlands, which held the heerlijkheid of Amstelland (the area around the Amstel), which it governed in the name of the bishop of Utrecht and the count of Holland.