Princess Charlotte of Prussia (1831–1855)
Princess Charlotte of Prussia( 21 June 1831 – 30 March 1855), was by birth a Princess of Prussia and member of the House of Hohenzollern and by marriage Hereditary Princess of Saxe- Meiningen.
She was the eldest child and daughter of Prince Albert of Prussia( younger son of Frederick William III of Prussia and Louise of Mecklenburg- Strelitz) and his first wife Princess Marianne of the Netherlands( daughter of William I of the Netherlands and Wilhelmine of Prussia).
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Prince Oskar of Prussia
Prince Oskar Karl Gustav Adolf of Prussia ("Oskar Karl Gustav Adolf Prinz von Preußen"; 27 July 1888 – 27 January 1958) was the fifth son of Wilhelm II, German Emperor and Augusta Victoria of Schleswig-Holstein-Sonderburg-Augustenburg.
Prince Wilhelm-Karl of Prussia
Prince Wilhelm Karl of Prussia ("Wilhelm Karl Adalbert Erich Detloff";
30 January 1922, in Potsdam – 9 April 2007, in Holzminden) was the third son of Prince Oskar of Prussia, and the last surviving grandson of Wilhelm II, the last German Emperor.
He was the thirty-sixth Master of Knights ("Herrenmeister") of the Protestant (and largely German) Order of Saint John (Bailiwick of Brandenburg), also known as "Der Johanniterorden".
Princess Elisabeth of Prussia
Princess Elisabeth of Prussia( 18 June 1815 – 21 March 1885) was the second daughter of Prince Wilhelm of Prussia and Landgravine Marie Anna of Hesse- Homburg and a granddaughter of Frederick William II of Prussia.
Prince Philip, Duke of Edinburgh is her great- great- grandson.
Prince Wilhelm of Prussia (1783–1851)
Prince Friedrich Wilhelm Karl of Prussia( July 1783, Berlin – 28 September 1851, Berlin) was the son of Frederick William II of Prussia and Frederika Louisa of Hesse- Darmstadt.
Hubba bint Hulail
Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic" Nabī"( Prophet) Muhammad ibn Abdullah.
Prince Eitel Friedrich of Prussia
Prince Wilhelm Eitel Friedrich Christian Karl of Prussia (7 July 1883 – 8 December 1942) was the second son of Emperor Wilhelm II of Germany by his first wife, Augusta Viktoria of Schleswig-Holstein.
He was born and died in Potsdam, Germany.
Prince Wilhelm of Saxe-Weimar-Eisenach
Prince Wilhelm Karl Bernhard Hermann of Saxe- Weimar- Eisenach( 21 December 1853 – 15 December 1924) was a member of the House of Saxe- Weimar- Eisenach.
Charles Pickthorn
Major Charles Edward Murray Pickthorn( 20 September 1896 – 3 March 1938) was a British World
War I flying ace credited with five aerial victories.
His fourth victory resulted in the death of Prince Friedrich Karl of Prussia.

Question: Who is the paternal grandmother of Prince Wilhelm-Karl Of Prussia?
Answer: Augusta Victoria