I would suggest checking out our thread on the royal families and Nazism--there could be some good leads on there. It's a 22 page thread:
http://forum.alexanderpalace.org/index.php?topic=4071.0As for the family:
Duke Carl Alexander of Württemberg entered the novitiate in 1920 as "Brother Odo", taking vows in February 1921 and was ordained a priest in 1926. In the summer of 1930, Father Odo was sent to the Abbey of St. Martin, in Weingarten and based partly on his family's conservative Catholicism, he was involved in opposition to National Socialism as early as 1933, and was interrogated by the Gestapo several times. The Nazis expelled Father Odo from Germany in 1936, and he took refuge in monasteries in Switzerland and Italy. In 1940, after the Swiss government informed him that it could not guarantee his safety, Father Odo decided to emigrate to the United States. Before leaving, he destroyed his personal papers, which consequently cannot be used to trace his activities in detail. From 1941 Father Odo lived in Washington, D. C., continuing his work with refugees, enabling Jews to emigrate from Germany and its conquered territories. From 1943 onward he was involved in the pastoral care of Germans in American prisoner of war camps.
---Eberhard Fritz: Das Haus Württemberg und der Nationalsozialismus in Christopher Dowe (Hg.): Adel und Nationalsozialismus im deutschen Südwesten (Stuttgarter Symposion, Band 11). Stuttgart 2007. S. 132-162.