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.
Jobst of Moravia Jobst of Moravia (Czech: "Jošt Moravský" or "Jošt Lucemburský"; German: "Jo(b)st" or "Jodokus von Mähren"; c. 1354 – 18 January 1411), a member of the House of Luxembourg, was Margrave of Moravia from 1375, Duke of Luxembourg and Elector of Brandenburg from 1388 as well as elected King of Germany (King of the Romans) from 1410 until his death. Jobst was an ambitious and versatile ruler, who in the early 15th century dominated the ongoing struggles within the Luxembourg dynasty and around the German throne.