Wittekind, Prince of Waldeck and Pyrmont
Wittekind Adolf Heinrich Georg- Wilhelm, Prince of Waldeck and Pyrmont( born 9 March 1936) has been since 1967 the head of the House of Waldeck and Pyrmont.
Princess Helena of Waldeck and Pyrmont
Princess Helena of Waldeck and Pyrmont
(Helene Friederike Auguste; later Duchess of Albany; 17 February 1861 – 1 September 1922), who became a member of the British royal family by marriage, was the fifth daughter and child of George Victor, Prince of Waldeck and Pyrmont and his first wife, Princess Helena of Nassau.
Princess Mathilde of Waldeck and Pyrmont
Princess" Mathilde" of Waldeck and Pyrmont( 10 April 1801 – 13 April 1825) was a member of the House of Waldeck and Pyrmont and a Princess of Waldeck and Pyrmont and a member of the House of Württemberg and a Duchess of Württemberg through her marriage to Duke Eugen of Württemberg
Princess Marie of Waldeck and Pyrmont
Princess Marie of Waldeck and Pyrmont (Georgine Henriette Marie; 23 May 1857 – 30 April 1882) was the third daughter of George Victor, Prince of Waldeck and Pyrmont and his wife, Princess Helena of Nassau, younger half-sister of Adolphe, Grand Duke of Luxembourg.
George I, Prince of Waldeck and Pyrmont
George I, Prince of Waldeck and Pyrmont( 6 May 17479 September 1813) was Prince of Waldeck and Pyrmont from 1812 to 1813.
He was the son of Karl August, Prince of Waldeck and Pyrmont and Countess Palatine Christiane Henriette of Zweibrücken- Birkenfeld.
George II, Prince of Waldeck and Pyrmont
George II, Prince of Waldeck and Pyrmont( 20 September 178915 May 1845) was Prince of Waldeck and Pyrmont from 1813 to 1845.
He was the son of George I, Prince of Waldeck and Pyrmont and Countess Princess Augusta of Schwarzburg- Sondershausen.
Princess Helena of Waldeck and Pyrmont (1899–1948)
Princess Helena of Waldeck and Pyrmont( 22 December 189918 February 1948) was the only daughter of Friedrich, Prince of Waldeck and Pyrmont, last reigning Prince of Waldeck and Pyrmont, and wife of Nikolaus, Hereditary Grand Duke of Oldenburg.
Princess Caroline of Waldeck and Pyrmont
Caroline Louise of Waldeck and Pyrmont( 14 August 1748 – 18 August 1782), was a Princess of Waldeck and Pyrmont by birth and Duchess consort of Courland by marriage.
She was the daughter of Karl August, Prince of Waldeck and Pyrmont, and Countess Palatine Christiane Henriette of Zweibrücken- Birkenfeld.
George Victor, Prince of Waldeck and Pyrmont
George Victor (14 January 1831 – 12 May 1893) was the 3rd sovereign Prince of the German state of Waldeck and Pyrmont.
He was born in Arolsen the son of George II, Prince of Waldeck and Pyrmont and his wife Princess Emma of Anhalt-Bernburg-Schaumburg-Hoym.
He succeeded as prince originally under the guardianship of his mother on 15 May 1845 following the death of his father.
He died of pneumonia in Marienbad, Bohemia and was succeeded by his eldest son Friedrich.
Princess Guda of Waldeck and Pyrmont
Princess Guda of Waldeck and Pyrmont( born 22 August 1939) is the youngest daughter of Josias, Hereditary Prince of Waldeck and Pyrmont, head of the House of Waldeck and Pyrmont from 1946 to 1967 and first wife of Frederick William, Prince of Wied.

Question: Why did Princess Helena Of Waldeck And Pyrmont's father die?
Answer: pneumonia