(row behind, L-R) King Carl Gustaf of Sweden and King Harald of Norway and, (sitting, L-R) Queen Silvia of Sweden, Queen Sonja of Norway and Queen Margrethe of Denmark on the occasion of the 25th anniversary of King Harald's ascension to the throne on January 17, 2016 at the Royal Castle in Oslo.
King Abel of Denmark -- (1218 - 1252). King of Denmark from 1250 until he died in 1252. He married Matilda of Holstein and had four children. He may have murdered his brother Eric IV in 1250 to gain the throne. He was killed in battle.