Frederick Casimir Kettler Duke of Courland (1650-1698) (1650–1698) Parents Margravine Louise Charlotte of Brandenburg Jacob Kettler Children Christina Sophia von Kettler Leopold Karl von Kettler Maria Dorothea von Kettler Eleonore Charlotte von Kettler Friedrich von Kettler Frederick William Kettler Amalie Louise of Courland Siblings Karl Jakob von Kettler Charlotte Sophie, Duchess of Courland Alexander of Courland Ferdinand Kettler Wladislaus Friedrich von Kettler Maria Amalia of Courland Louise Elisabeth of Courland Partners Margravine Elisabeth Sophie of Brandenburg Countess Sophie Amalie of Nassau-Siegen
