Who was Jutta of Saxony's father-in-law?
Jutta of Saxony: Jutta of Saxony (c. 1223 – before 2 February 1267) was a Danish Queen consort, spouse of King Eric IV of Denmark. Eric IV of Denmark:  He was the son of King Valdemar II by his wife, Berengaria of Portugal, and brother of King Abel and King Christopher I.
King Valdemar II