Princess Helena Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg [SEP] father
Princess Helena Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg
Princess Helena Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg (; 1 June 1888 - 30 June 1962) was the third eldest daughter of Friedrich Ferdinand, Duke of Schleswig-Holstein and his wife Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Augustenburg. She was a princess of Denmark through her marriage within the House of Schleswig-Holstein-Sonderburg-Glücksburg to Prince Harald of Denmark. Princess Helena was a Nazi sympathiser during World War II and was after
at Primkenau. Friedrich Ferdinand and Karoline Mathilde had six children:
- Princess Victoria Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg (31 December 1885 – 3 October 1970)
- Princess Alexandra Victoria of Schleswig-Holstein-Sonderburg-Glücksburg (21 April 1887 – 15 April 1957)
- Princess Helena Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg (1 June 1888 – 30 June 1962)
- Princess Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg (19 October 1889 – 11 June 1964)