Casimir Johannes Prinz zu Sayn-Wittgenstein-Berleburg

Casimir Johannes Ludwig Otto Prince zu Sayn-Wittgenstein-Berleburg (22 January 1917 – 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.

Political career
Sayn-Wittgenstein-Berleburg was CDU treasurer during the CDU donations scandal.

Family
He was stepson of Richard Merton (industrialist) and father-in-law of Wolfgang-Ernst, Prince of Ysenburg and Büdingen.