Prince Friedrich of Windisch-Graetz (1917-2002) (1917–2002) Parents Prince Hugo, 4th Prince of Windisch-Graetz Princess Leontine, Princess of Windisch-Graetz Children Princess Marina of Windisch-Graetz Princess Clarissa of Windisch-Graetz Siblings Prince Hugo of Windisch-Graetz Princess Irma, Princess of Weikersheim Prince Maximilian, 5th Prince of Windisch-Graetz Partners Princess Dorothea of Hesse