Born Otto Friedrich Carl on 31st May 1985 at Würzburg to Their Illustrious Highnesses Hereditary Prince Johann-Friedrich and Hereditary Princess Maria of Castell-Rüdenhausen.
Johann-Friedrich, 5th Prince of Castell-Rüdenhausen
Maria, The Dowager Princess of Castell-Rüdenhausen
His engagement to Miss Sophia Mautner von Markhof was announced on 5th October 2018.
The couple married civilly on 29th December 2019 at the town hall of Rüdenhausen, Germany. The married religiously Augustinian Abbey Church in Waldhausen im Strudengau, Upper Austria on 15th June 2019.
31st May 1985 – 30th October 2014; His Illustrious Highness Otto, The Hereditary Prince of Castell-Rüdenhausen.
30th October 2014 – Present; His Illustrious Highness Otto, The 6th Prince of Castell-Rüdenhausen.
LIne of Succession
Otto, The Prince of Castell-Rüdenhausen
- Count Anton of Castell-Rüdenhausen