Who was Jutta of Saxony's father-in-law?
Eric IV of Denmark Eric IV, also known as Eric Ploughpenny or Eric Plowpenny (Danish: "Erik Plovpenning" ), (  1216 – 10 August 1250) was king of Denmark from 1241 until his death in 1250. He was the son of King Valdemar II by his wife, Berengaria of Portugal, and brother of King Abel and King Christopher I.
Joseph Ferdinand of Bavaria Joseph Ferdinand Leopold of Bavaria (28 October 1692 – 6 February 1699) was the son of Maximilian II Emanuel, Elector of Bavaria (1679–1705, 1714–1726) and his first wife, Maria Antonia of Austria, daughter of Leopold I, Holy Roman Emperor, maternal granddaughter of King Felipe IV of Spain.