Ernst Casimir II, 2nd Prince of Ysenburg and Büdingen German prince (1806-1861) (1806–1861) Parents Countess Ferdinande of Erbach-Schönberg Ernst Casimir I, Prince of Prince of Ysenburg and Büdingen Children Lothar Prinz zu Ysenburg und Büdingen Bruno, 3rd Prince of Ysenburg and Büdingen Adalbert Prinz zu Ysenburg und Büdingen in Büdingen Emma of Ysenburg and Büdingen in Büdingen Princess Agnes of Ysenburg and Büdingen in Büdingen Siblings Prince Gustav of Ysenburg and Büdingen in Büdingen Partners Thekla Gräfin zu Erbach-Fürstenau