Wilhelm Friedrich, Duke of Schleswig-Holstein
Wilhelm Friedrich, Duke of Schleswig-Holstein-Sonderburg-Glücksburg, from 1934 Duke of Schleswig-Holstein, was the sixth Duke of Schleswig-Holstein and Head of the House of Oldenburg from 21 January 1934 until his death on 10 February 1965. Wikipedia
Born: August 23, 1891, Province of Schleswig-Holstein
Died: February 10, 1965 (age 73 years), Coburg, Germany
Great grandchildren: Christoph Baron von Plotho and Baroness Irina von Plotho