Question: When did John Casimir, Count Palatine Of Kleeburg's mother die?
Sentence (from "John Casimir, Count Palatine of Kleeburg"): John Casimir, Count Palatine of Zweibrücken-Kleeburg (20 April 1589, Zweibrücken – 18 June 1652, Stegeborg Castle) was the son of John I, Count Palatine of Zweibrücken and his wife, Duchess Magdalene of Jülich-Cleves-Berg and was the founder of a branch of Wittelsbach Counts Palatine often called the "Swedish line", because it gave rise to three subsequent kings of Sweden, but more commonly known as the Kleeburg (or Cleebourg) line.
Relevant evidence: Yes