Question: Who is Prince Friedrich Christian Of Schaumburg-Lippe's maternal grandfather?

Knowledge 1: Prince Friedrich Christian of Schaumburg-Lippe
Prince Friedrich Christian of Schaumburg-Lippe (5 June 1906 – 20 September 1983) was a German prince, the youngest son of Georg, Prince of Schaumburg-Lippe and his consort Princess Marie Anne of Saxe-Altenburg.Unhappy and disillusioned with the state of Germany after World War I, Friedrich Christian turned to the Nazi Party as a solution for the country's ills.As an ardent Party supporter, he worked vigorously to gain noble and royal support for it, and eventually became an upper privy councillor and adjutant to Propaganda Minister Joseph Goebbels.In 1939, Friedrich Christian was asked to become king of Iceland by Icelanders sympathetic to the Nazi party, but refused due to the opposition of Foreign Minister Joachim von Ribbentrop.After World War II, the prince devoted his writings to defending the record of the Third Reich, producing such works as "Was Hitler Really a Dictator?"(a personal account of the German leader) andAls die goldne Abendsonne..."Aus meinenTagebüchern der Jahre 1933–1937" (the prince's personal diaries). [SEP] Knowledge 2: Princess Marie Anne of Saxe-Altenburg
Princess Marie Anne of Saxe-Altenburg (14 March 1864 – 3 May 1918) was the consort of Georg, Prince of Schaumburg-Lippe.As the eldest daughter of Prince Moritz of Saxe-Altenburg and his wife Princess Augusta of Saxe-Meiningen, and a sister of Ernest II, Duke of Saxe-Altenburg, Marie Anne was a member of the Ducal House of Saxe-Altenburg.
Knowledge 1: Prince Friedrich Christian of Schaumburg-Lippe
Prince Friedrich Christian of Schaumburg-Lippe (5 June 1906 – 20 September 1983) was a German prince, the youngest son of Georg, Prince of Schaumburg-Lippe and his consort Princess Marie Anne of Saxe-Altenburg.Unhappy and disillusioned with the state of Germany after World War I, Friedrich Christian turned to the Nazi Party as a solution for the country's ills.As an ardent Party supporter, he worked vigorously to gain noble and royal support for it, and eventually became an upper privy councillor and adjutant to Propaganda Minister Joseph Goebbels.In 1939, Friedrich Christian was asked to become king of Iceland by Icelanders sympathetic to the Nazi party, but refused due to the opposition of Foreign Minister Joachim von Ribbentrop.After World War II, the prince devoted his writings to defending the record of the Third Reich, producing such works as "Was Hitler Really a Dictator?"(a personal account of the German leader) andAls die goldne Abendsonne..."Aus meinenTagebüchern der Jahre 1933–1937" (the prince's personal diaries). [SEP] Knowledge 2: 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.
Knowledge 1: Prince Friedrich Christian of Schaumburg-Lippe
Prince Friedrich Christian of Schaumburg-Lippe (5 June 1906 – 20 September 1983) was a German prince, the youngest son of Georg, Prince of Schaumburg-Lippe and his consort Princess Marie Anne of Saxe-Altenburg.Unhappy and disillusioned with the state of Germany after World War I, Friedrich Christian turned to the Nazi Party as a solution for the country's ills.As an ardent Party supporter, he worked vigorously to gain noble and royal support for it, and eventually became an upper privy councillor and adjutant to Propaganda Minister Joseph Goebbels.In 1939, Friedrich Christian was asked to become king of Iceland by Icelanders sympathetic to the Nazi party, but refused due to the opposition of Foreign Minister Joachim von Ribbentrop.After World War II, the prince devoted his writings to defending the record of the Third Reich, producing such works as "Was Hitler Really a Dictator?"(a personal account of the German leader) andAls die goldne Abendsonne..."Aus meinenTagebüchern der Jahre 1933–1937" (the prince's personal diaries). [SEP] Knowledge 2: 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.

Answer: Prince Moritz of Saxe-Altenburg