Prince Maximilian, 5th Prince of Windisch-Graetz (1914-1976) (1914–1976) Parents Princess Leontine, Princess of Windisch-Graetz Prince Hugo, 4th Prince of Windisch-Graetz Children Prince Mariano Hugo, 6th Prince of Windisch-Graetz Princess Christiana of Windisch-Graetz Princess Maximiliane, Princess of Fürstenberg Siblings Prince Hugo of Windisch-Graetz Princess Irma, Princess of Weikersheim Prince Friedrich of Windisch-Graetz Partners Maria Luisa Serra di Carafa di Gerace