Princess Louise of Prussia (1770–1836)
Princess Frederica Dorothea "Louise" Philippine of Prussia (24 May 1770 - 7 December 1836) was a member of the House of Hohenzollern.
She was a niece of Frederick the Great, being the second daughter and third child of Prince Augustus Ferdinand of Prussia by his wife Margravine Elisabeth Louise of Brandenburg-Schwedt.
Louise and her husband Prince Antoni Radziwiłł were popular for their patronage of music, as well as their prominent positions in Berlin society.
Louise is also notable for being the mother of Elisabeth Radziwill, the childhood love of future German Emperor Wilhelm I, whose strong desire to marry her was thwarted out of considerations for Elisabeth's inequality of rank.
Margrave Frederick William of Brandenburg-Schwedt (1715–1744)
Frederick William of Brandenburg- Schwedt( 18 March 1715 – 12 September 1744 in Prague) was a Prussian Major General and commander of the Guards on Foot.
He was the son of Margrave Albert Frederick of Brandenburg- Schwedt and his wife Maria Dorothea of Courland( 1684- 1743).
In his lifetime he held the courtesy title of Margrave of Brandenburg.
His first cousin of the same name( Frederick William) was of the senior line and held the town and lands of Schwedt.
Charles Philip of Brandenburg-Schwedt
Margrave Charles Philip of Brandenburg-Schwedt (5 January 1673 in Sparnberg – 23 July 1695 in Casale Monferrato) was a Hohenzollern prince and a titular Margrave of Brandenburg-Schwedt.
Near the end of his life he became Grand Master of the Order of Saint John (Bailiwick of Brandenburg).
Prince Augustus of Prussia
Prince Friedrich Wilhelm Heinrich August of Prussia( 19 September 1779- 19 July 1843), known in English as Prince Augustus, was a Prussian general.
Born on Friedrichsfelde Palace, he was the youngest son of Prince Augustus Ferdinand of Prussia, the brother of King Frederick the Great, and Margravine Elisabeth Louise of Brandenburg- Schwedt.
Henrietta Maria of Brandenburg-Schwedt
Henriette Maria of Brandenburg- Schwedt( 2 March 1702 probably in Berlin – 7 May 1782 in Köpenick), was a granddaughter of the" Great Elector" Frederick William of Brandenburg.
She was the daughter of Philip William, Margrave of Brandenburg- Schwedt( 1669- 1711), the eldest son of the elector's second marriage with Sophia Dorothea of Schleswig- Holstein- Sonderburg- Glücksburg.
Her mother was Johanna Charlotte( 1682- 1750), the daughter of Prince John George II, Prince of Anhalt- Dessau.
Princess Anna Elisabeth Louise of Brandenburg-Schwedt
Princess and Margravine Anna Elisabeth Louise of Brandenburg-Schwedt (22 April 1738 – 10 February 1820) was a Prussian princess.
She was a daughter of Margrave Frederick William of Brandenburg-Schwedt and his wife, Princess Sophia Dorothea of Prussia.
Marie Amalie of Brandenburg
Maria Amalia of Brandenburg- Schwedt( 26 November 1670 in Cölln – 17 November 1739 at Bertholdsburg Castle in Schleusingen) was a princess from the Brandenburg- Schwedt line of the House of Hohenzollern and by marriage a Duchess of Saxe- Zeitz.
Frederick William, Margrave of Brandenburg-Schwedt
Frederick William of Brandenburg- Schwedt( 17 November 1700 – 4 March 1771) was a German nobleman.
In his lifetime, from 1711 to 1771, he held the titles Prince in Prussia and Margrave of Brandenburg, with the style Royal Highness.
He was made a knight of the Order of the Black Eagle.
In the 19th century he was retrospectively known by the title Margrave of Brandenburg- Schwedt, in order to differentiate his branch of the Hohenzollern dynasty.
He was the second owner of the Prussian secundogeniture of Brandenburg- Schwedt.
His parents were Philip William, Margrave of Brandenburg- Schwedt, and Princess Johanna Charlotte of Anhalt- Dessau.
He was the nephew of King Frederick I of Prussia.
Charles Frederick Albert, Margrave of Brandenburg-Schwedt
Karl Friedrich Albrecht, Margrave of Brandenburg-Schwedt (10 June 1705 – 22 June 1762), a grandson of Frederick William of Brandenburg ("the Great Elector") and son of Margrave Albert Frederick of Brandenburg-Schwedt, was a Prussian military officer and the "Herrenmeister" (grand master) of the Order of Saint John (Bailiwick of Brandenburg).
Charles of Brandenburg-Schwedt was born in Berlin.
He joined the Prussian Army at an early age and distinguished himself during the First Silesian War at the capture of Głogów, at the Battle of Mollwitz and the Battle of Chotusitz.
He took command in Upper Silesia in the spring of 1745, to the special satisfaction of his cousin, King Frederick II of Prussia.
During the Seven Years' War Margrave Charles again held independent commands, as Frederick II had confidence in him, and he distinguished himself at the Battle of Hochkirch and the Battle of Torgau.
In both battles, as at Mollwitz, he was wounded.
The General German Biography (ADB) describes him as a noble, philanthropic character and lover of the arts and sciences.
For 31 years he governed the knights, the Bailiwick of Brandenburg, and its fiefs as Grand Master of the Order of St. John, having been installed at Sonnenburg in 1731.
He died in Breslau.
Princess Sophia Dorothea of Prussia
Princess Sophia Dorothea of Prussia  (25 January 1719 – 13 November 1765) was the ninth child and fifth daughter of Frederick William I of Prussia and Sophia Dorothea of Hanover.
By marriage, she was a Margravine of Brandenburg-Schwedt.

Question: Who is Princess Anna Elisabeth Louise Of Brandenburg-Schwedt's maternal grandfather?
Answer: Frederick William I of Prussia