Background
Peter was the third and youngest son of Wilhelm Friedrich, Duke of Schleswig-Holstein and his wife, Princess Marie Melita of Hohenlohe-Langenburg.
Peter was the third and youngest son of Wilhelm Friedrich, Duke of Schleswig-Holstein and his wife, Princess Marie Melita of Hohenlohe-Langenburg.
Titles and styles 30 April 1922 – 10 August 1944: His Highness Prince Peter of Schleswig-Holstein-Sonderburg-Glücksburg 10 August 1944 – 10 February 1965: His Highness The Hereditary Prince of Schleswig-Holstein 10 February 1965 – 30 September 1980: His Highness The Duke of Schleswig-Holstein.