Francis of Denmark
Francis of Denmark( 15 July 1497 – 1 April 1511), was a prince of Denmark, Norway and Sweden, the youngest son of King John of Denmark and Christina of Saxony.
Carol Victor, Hereditary Prince of Albania
Carol Victor, Hereditary Prince of Albania( Karl Viktor Wilhelm Friedrich Ernst Günther von Wied, 19 May 19138 December 1973) was the only son of William, Prince of Albania and briefly heir to the Principality of Albania.
He held the title of" Hereditary Prince of Albania".
He was also styled Skënder, in homage to Skanderbeg, the national hero.
Peter, Hereditary Prince of Yugoslavia
Peter, Hereditary Prince of Yugoslavia( born 5 February 1980), also known as Peter III Karađorđević(/" Petar III Karađorđević"), is the eldest son of Alexander, Crown Prince of Yugoslavia, and Princess Maria da Gloria of Orléans- Braganza.
Prince Peter is the grandson of King Peter II.
Peter, Hereditary Prince of Yugoslavia' is second in line after his father HRH Crown Prince Alexander to the defunct throne.
Prince Ernest Augustus of Hanover (1914–1987)
Ernst August, Hereditary Prince of Brunswick, Prince of Hanover( 18 March 1914 – 9 December 1987) was head of the House of Hanover from 1953 until his death.
From his birth until the German Revolution of 1918 – 1919 he was the" Erbprinz"( Hereditary Prince) of the Duchy of Brunswick, a state of the German Empire.
He was born at Braunschweig, Germany, the eldest son of Ernest Augustus, Duke of Brunswick and Princess Viktoria Luise of Prussia, the only daughter of Emperor Wilhelm II, Ernest Augustus's third cousin in descent from George III of the United Kingdom.
Ernst August's parents were, therefore, third cousins, once removed.
From his birth, he was the" Hereditary Prince of Brunswick".
He was also, shortly after birth in 1914, made a British prince by King George V of the United Kingdom, and was heir to the titles Duke of Cumberland and Teviotdale and Earl of Armagh which were suspended under the Titles Deprivation Act 1917.
Ferdinand, Hereditary Prince of Denmark
Frederick Ferdinand, Hereditary Prince of Denmark  (22 November 1792 – 29 June 1863) was grandson of King Frederick V and heir presumptive to the throne from 1848 until his death.
Had he lived five months longer, he would have outlived his nephew, King Frederick VII, and become King of Denmark.
Princess Caroline-Mathilde of Denmark
Princess Caroline- Mathilde of Denmark( 27 April 1912 – 12 December 1995) was a daughter of Prince Harald of Denmark and granddaughter of King Frederick VIII of Denmark.
As the wife of Knud, Hereditary Prince of Denmark, she became Hereditary Princess of Denmark.
John Dalgleish Donaldson
John Dalgleish Donaldson( born 5 September 1941) is a Scottish- Australian professor and the father of Mary, Crown Princess of Denmark, the wife of the heir apparent to the throne of Denmark, Frederik, Crown Prince of Denmark.
Friedrich Ferdinand, Hereditary Prince of Schleswig-Holstein
Friedrich Ferdinand, Hereditary Prince of Schleswig- Holstein( born 19 July 1985 in Eckernförde, Schleswig- Holstein, West Germany) is the heir apparent of Christoph, Prince of Schleswig- Holstein, current head of the House of Schleswig- Holstein, the senior extant line of the House of Oldenburg.
Friedrich Ferdinand is the eldest son of Christoph and his wife Princess Elisabeth of Lippe- Weissenfeld.
As a 4 th- great- grandson of Queen Victoria, he is in the line of succession to the British throne.
He is heir- apparent to the headship of a house that includes the Queen of Denmark, the King of Norway, the deposed King of Greece and, patrilineally, the Prince of Wales.
He is styled as" His Highness the Hereditary Prince of Schleswig- Holstein".
Princess Juliane Sophie of Denmark
Juliane Sophie( 18 February 1788, in Copenhagen – 9 May 1850, in Copenhagen) was a Princess of Denmark, the daughter of Frederick, Hereditary Prince of Denmark, who himself was a younger son of King Frederick V of Denmark in his second marriage to queen Juliana Maria of Braunschweig- Wolfenbüttel.
Frederick, Hereditary Prince of Denmark
Frederick, Hereditary Prince of Denmark (11 October 1753 – 7 December 1805) was heir presumptive to the thrones of Denmark and Norway.
He was the only surviving son of King Frederick V by his second wife, Juliana Maria of Braunschweig-Wolfenbüttel.
Hereditary Prince Frederick acted as regent on behalf of his half-brother King Christian VII from 1772 to 1784.

Question: What is the date of death of Ferdinand, Hereditary Prince Of Denmark's father?