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.
Manfred, King of Sicily Manfred (Sicilian: "Manfredi di Sicilia" ; 1232 – 26 February 1266) was the King of Sicily from 1258 to 1266. He was an illegitimate son of the emperor Frederick II of Hohenstaufen, but his mother, Bianca Lancia (or Lanzia), is reported by Matthew Paris to have been married to the emperor while on her deathbed.