Question: Who is Charles Gustav Of Baden-Durlach's maternal grandfather?
Sentence (from "Christina Magdalena of the Palatinate-Zweibrücken"): She was the daughter of John Casimir, Count Palatine of Kleeburg and Princess Catherine of Sweden (a granddaughter of Gustav I of Sweden, making Christina a link between the house of Vasa and the later houses of Holstein-Gottorp and Bernadotte).
Relevant evidence: Yes