Duke Carl Alexander of Württemberg

He acted as an informant of the Federal Bureau of Investigation and spied on Wallis Simpson, the lover and later wife of the former British king Edward VIII.

[3] On 22 August 1914, shortly after the start of World War I, he entered active service in the regiment and saw action on the Western Front and in Italy.

[6] Carl Alexander resigned from the army at the rank of Hauptmann (captain) following the German Revolution of 1918–1919, and within a few months became a postulant at the Abbey of St. Martin in Beuron.

Because of his position and his family's conservative Catholic values, he was involved in opposition to National Socialism as early as 1933 and was interrogated by the Gestapo several times.

From 1941 Father Odo lived in Washington, D. C., continuing his work with refugees and enabling Jews to emigrate from Germany and its conquered territories.

He told the Federal Bureau of Investigation that the Duchess of Windsor had been sleeping with Joachim von Ribbentrop when he was the German ambassador in London (1936–1938).

[9] Father Odo was briefly interviewed and mentioned in the 1959 biography of his aunt Queen Mary of Teck by the British biographer James Pope-Hennessy.