Prince Waldemar of Schaumburg-Lippe
Prince Waldemar Stephen of Schaumburg-Lippe ("Waldemar Stephan Ferdinand Wolrad Friedrich Karl", b. 19 December 1940 in Glienicke) is a son of Prince Christian of Schaumburg-Lippe and Princess Feodora of Denmark, and the great-grandson of King Frederick VIII of Denmark.
Heinrich Donatus, Hereditary Prince of Schaumburg-Lippe
Heinrich Donatus, Hereditary Prince of Schaumburg- Lippe( Ernst- August Alexander Wilhelm Bernhard Krafft Heinrich Donatus; born 13 May 1994) is the son of Alexander, Prince of Schaumburg- Lippe and thus heir to the German Princely house of Schaumburg- Lippe.
Prince Heinrich Donatus of Schaumburg- Lippe was born in Hanover to Alexander, Hereditary Prince of Schaumburg- Lippe( born 1958), and Princess Marie- Louise(" Lilly") of Sayn- Wittgenstein- Berleburg( born 1972), who had married in August 1993.
His mother suffered a nervous breakdown in 1998, and left her husband in 2000 to move with her son from Hanover to Munich.
The couple divorced in 2002.
On the death of his father, Philip- Ernst, Prince of Schaumburg- Lippe, Alexander inherited the title Prince of Schaumburg- Lippe, while his son became Hereditary Prince.
In 2007, the Prince of Schaumburg- Lippe married lawyer Nadja Anna Zsoeks.
Princess Marie- Louise is now married to designer Lambros Milona, with whom she has a daughter, Lana.
Prince Wilhelm of Schaumburg-Lippe (b. 1939)
Prince Wilhelm of Schaumburg- Lippe( Wilhelm Friedrich Harald Christian Ernst August Karl Gustav zu Schaumburg- Lippe, born 19 August 1939) is the head of the Nachod branch of the princely house of Schaumburg- Lippe.
Wilhelm is the son of Prince Christian Nicholas of Schaumburg- Lippe, and the great- grandson of Frederick VIII of Denmark.
Adolf I, Prince of Schaumburg-Lippe
Adolf I, Prince of Schaumburg-Lippe (1 August 1817 – 8 May 1893) was a ruler of the Principality of Schaumburg-Lippe.
Prince Frederick of Schaumburg-Lippe
Prince Frederick of Schaumburg- Lippe( 30 January 186812 December 1945) was a German prince and head of the Náchod branch of the princely house of Schaumburg- Lippe.
He was a son of Prince William of Schaumburg- Lippe, by his wife Princess Bathildis of Anhalt- Dessau.
Wolrad, Prince of Schaumburg-Lippe
Ernst Wolrad, Prince of Schaumburg- Lippe( 19 April 1887 – 15 June 1962) was a head of the Princely House of Schaumburg- Lippe.
Georg, Prince of Schaumburg-Lippe
Georg, Prince of Schaumburg- Lippe( 10 October 1846 – 29 April 1911) was a ruler of the small Principality of Schaumburg- Lippe.
Princess Eleonore of Schaumburg-Lippe
Princess Eleonore-Christine of Schaumburg-Lippe (Eleonore-Christine Eugenie Benita Feodora Maria; born 22 December 1978 at Hørsholm, Denmark) is the daughter of Prince Waldemar of Schaumburg-Lippe and his first wife, Anne-Lise Johansen.
Princess Eleonore-Christine is a great-great-granddaughter of King Frederick VIII of Denmark.
He is in the line of succession to the British throne as a descendant of George II of the United Kingdom's daughter Queen Caroline Matilda of Denmark and Norway.
Frederick Christian, Count of Schaumburg-Lippe
Friedrich Christian, Count of Schaumburg- Lippe( 16 August 1655 – 13 June 1728) was the second ruler of the County of Schaumburg- Lippe.
Adolf II, Prince of Schaumburg-Lippe
Adolf II, Prince of Schaumburg- Lippe( 23 February 1883 – 26 March 1936) was the last ruler of the small Principality of Schaumburg- Lippe.

Question: Who is Princess Eleonore Of Schaumburg-Lippe's paternal grandfather?
Answer: Prince Christian of Schaumburg-Lippe