Princess Irma, Princess of Weikersheim (1913-1984) (1913–1984) Parents Princess Leontine, Princess of Windisch-Graetz Prince Hugo, 4th Prince of Windisch-Graetz Children Cecilia Gräfin von Weikersheim Siblings Prince Hugo of Windisch-Graetz Prince Friedrich of Windisch-Graetz Prince Maximilian, 5th Prince of Windisch-Graetz Partners Prince Franz, 2nd Prince of Weikersheim