Question: By what nickname was the father of George Frederick of Brandenburg-Ansbach known ? 

full_context: Document 1: Dorothea Friederike of Brandenburg-Ansbach: Dorothea Friederike of Brandenburg-Ansbach (12 August 1676, Ansbach – 13 March 1731, Hanau) was the daughter of Margrave John Frederick of Brandenburg-Ansbach (1654 – 1686) and his first wife, Margravine Johanna Elisabeth of Baden-Durlach (1651 – 1680). She was a half-sister of Queen Caroline of Great Britain, the wife of King George II
Document 2: Prince George William of Great Britain: Prince George William of Great Britain (13 November 1717 – 17 February 1718) was an infant member of the British royal family, second son of George II and Caroline of Ansbach who, at the time of his birth, were the Prince and Princess of Wales. He died aged 3 months, 4 days.
Document 3: Prince Georg of Hanover: Prince Georg of Hanover ("Georg Paul Christian Prinz von Hannover"), Duke of Brunswick-Lüneburg (born 9 December 1949 at Schloss Salem in Salem, Baden-Württemberg, Germany). Georg is the second eldest son of Prince George William of Hanover and his wife Princess Sophie of Greece and Denmark, an elder sister of Prince Philip, Duke of Edinburgh. Georg is a male-line descendant of George III of the United Kingdom and Charlotte of Mecklenburg-Strelitz and a descendant of Albert, Prince Consort and Victoria of the United Kingdom through their daughters Victoria, Princess Royal and Princess Alice of the United Kingdom. He is a first cousin of Charles, Prince of Wales and nephew of Prince Philip, Duke of Edinburgh and Elizabeth II of the United Kingdom.
Document 4: Sophia Dorothea of Celle: Sophia Dorothea of Celle (15 September 1666 – 13 November 1726) was the repudiated wife of George I, King of Great Britain and mother of George II. The union with her first cousin was an arranged marriage of state, instigated by the machinations of his mother, Sophia of Hanover. She is best remembered for her alleged affair with Philip Christoph von Königsmarck that led to her being imprisoned in the Castle of Ahlden for the last thirty years of her life.
Document 5: George William, Duke of Brunswick-Lüneburg: George William German: "Georg Wilhelm" (Herzberg am Harz, 26 January 1624 – 28 August 1705, Wienhausen) was Duke of Brunswick-Lüneburg. He ruled first over the Principality of Calenberg, a subdivision of the duchy, then over the Lüneburg subdivision. In 1689, he occupied the Duchy of Saxe-Lauenburg and passed it on to his successors. George William was the father of Sophia Dorothea of Celle, wife of George I of Great Britain.
Document 6: George Frederick II, Margrave of Brandenburg-Ansbach: George Frederick II, Margrave of Brandenburg-Ansbach
Document 7: Anna Marie of Brunswick-Lüneburg: Anna Marie of Brunswick-Lüneburg (also: "Anna Maria of Brunswick-Göttingen-Calenberg"; German: "Anna Maria von Braunschweig-Calenberg-Göttingen" ; born: 23 April 1532 in Hann. Münden; died: 20 March 1568 in Gurievsk (German: "Neuhausen" ) near Königsberg) was a Duchess of Brunswick-Lüneberg by birth and by marriage Duchess of Prussia.
Document 8: George, Margrave of Brandenburg-Ansbach: George of Brandenburg-Ansbach (German: "Georg or Jürgen der Fromme" ) (4 March 1484 – 27 December 1543), known as George the Pious, was a Margrave of Brandenburg-Ansbach from the House of Hohenzollern.
Document 9: Princess Margaretha of Saxony: Princess Margaretha of Saxony, Duchess of Saxony (German: "Prinzessin Margaretha Karoline Friederike Cecilie Auguste Amalie Josephine Elisabeth Maria Johanna von Sachsen, Herzogin zu Sachsen" ) (24 May 1840 – 15 September 1858) was the eighth child and fifth eldest daughter of John of Saxony and his wife Amalie Auguste of Bavaria and a younger sister of Albert of Saxony and George of Saxony. She was born in Dresden, then in the Kingdom of Saxony. Through her marriage to Archduke Charles Louis of Austria, Margaretha was a member of the House of Habsburg-Lorraine and an Archduchess and Princess of Austria and Princess of Hungary, Croatia, Bohemia, and Tuscany.
Document 10: Margrave Andrew of Burgau: Andreas von Österreich, Margrave of Burgau, also known as Andrew of Austria (15 June 1558 at Březnice Castle in Březnice, Bohemia – 12 November 1600 in Rome) was a cardinal, Bishop of Constance and of Brixen. He belonged to the Austrian nobility, descending from its ruling dynasty, the House of Habsburg.
Document 11: George Frederick, Margrave of Brandenburg-Ansbach: George Frederick of Brandenburg-Ansbach (German: "Georg Friedrich der Ältere" ; 5 April 1539 in Ansbach – 25 April 1603) was Margrave of Ansbach and Bayreuth, as well as Regent of Prussia. He was the son of George, Margrave of Brandenburg-Ansbach and a member of the House of Hohenzollern. He married firstly, in 1559, Elisabeth of Brandenburg-Küstrin (29 August 1540 – 8 March 1578). He married secondly, in 1579, Sophie of Brunswick-Lüneburg (30 October 1563 – 1639), daughter of William of Brunswick-Lüneburg and Dorothea of Denmark.
Document 12: John Frederick, Margrave of Brandenburg-Ansbach: John Frederick, Margrave of Brandenburg-Ansbach (18 October 1654 – 22 March 1686) succeeded his father Albert II as margrave of Ansbach in 1667. He married his second wife Eleonore Erdmuthe of Saxe-Eisenach on 4 November 1681. Their daughter Wilhelmine Charlotte Caroline, Margravine of Brandenburg-Ansbach (Caroline of Ansbach) married George II of Great Britain before he became king.
Document 13: Joachim Ernst, Margrave of Brandenburg-Ansbach: Joachim Ernst, Margrave of Brandenburg-Ansbach (22 June 1583, Cölln an der Spree – 7 March 1625, Ansbach) was a German nobleman. He ruled as margrave of Brandenburg-Ansbach from 1603 to 1625, succeeding his cousin George Frederick and succeeded by his son Frederick III.
Document 14: Flag of Prussia: The state of Prussia had its origins in the separate lands of the Margraviate of Brandenburg and of the Duchy of Prussia. The Margraviate of Brandenburg developed from the medieval Northern March of the Holy Roman Empire, passing to the House of Hohenzollern in 1415. The Duchy of Prussia originated in 1525 when Albert of Brandenburg-Ansbach, a member of a cadet branch of the Hohenzollerns, secularized the eastern lands of the Teutonic Knights as a Polish fief. Prince-elector John Sigismund, Elector of Brandenburg, inherited the Duchy of Prussia in 1618, thus uniting Brandenburg and Prussia under one ruler in a personal union; the Elector's state became known as Brandenburg-Prussia. The Kingdom of Prussia formed when Elector Frederick III assumed the title of Frederick I, King in Prussia, on 18 January 1701.
Document 15: Prince George of Denmark: Prince George of Denmark and Norway, Duke of Cumberland (Danish: "Jørgen" ; 2 April 165328 October 1708), was the husband of Queen Anne, who reigned over Great Britain from 1702.
ground_truth: George the Pious