Jacob Kettler Duke of Courland (1610–1682) (1610–1682) Parents Duchess Sophie of Prussia Wilhelm Kettler James VI and I Children Charlotte Sophie, Duchess of Courland Maria Amalia of Courland Alexander of Courland Louise Elisabeth of Courland Frederick Casimir Kettler Wladislaus Friedrich von Kettler Ferdinand Kettler Karl Jakob von Kettler Partners Margravine Louise Charlotte of Brandenburg
