Casimir Johannes Ludwig Otto, Prince of Sayn-Wittgenstein-Berleburg (22 January 1917 â 21 February 2010) was a German nobleman, businessman and politician from the Christian Democratic Union. He was Member of the European Parliament from 1979 to 1983.
Sayn-Wittgenstein-Berleburg was CDU treasurer during the CDU donations scandal.
He was stepson of and father-in-law of Wolfgang-Ernst, Prince of Ysenburg and Büdingen.