Peter, Duke of Schleswig-Holstein-Sonderburg-Glücksburg, from 1965 Duke of Schleswig-Holstein, was the seventh Duke of Schleswig-Holstein and Head of the House of Oldenburg from 1965 until his death. Wikipedia
Born: April 30, 1922, Province of Schleswig-Holstein
Died: September 30, 1980 (age 58 years), Thumby, Germany
Spouse: Princess Marie Alix of Schaumburg-Lippe (m. 1947–1980)
Grandchildren: Christoph Baron von Plotho and Baroness Irina von Plotho