Over what time period did the dynasty of which Eric Christoffersen of Denmark was a member provide the Kings of Denmark?
House of Estridsen The House of Estridsen, sometimes called the Estridsen or Estrith Dynasty, was the dynasty that provided the Kings of Denmark from 1047 to 1412. The dynasty is named after its ancestor Estrid Svendsdatter. The dynasty is sometimes called the "Ulfinger", after Estrid's husband, Ulf the Earl.
Sven Aggesen Svend Aggesen (or "Sven"; also known as "Aggessøn", "Aggesøn" or "Aagesen", in Latin "Sveno Aggonis"; born around 1140 to 1150, death unknown) is the author of "Brevis historia regum Dacie", one of the first attempts to write a coherent history of Denmark covering the period 300AD-1185AD. Only the "Chronicon Roskildense" may precede Aggesen's efforts.