Princess Catherine of Württemberg
Princess Catherine Frederica Charlotte of Württemberg (Stuttgart, 24 August 1821 – Stuttgart, 6 December 1898) was a daughter of William I of Württemberg and Pauline Therese of Württemberg.
She was the mother of William II of Württemberg.
Louis Frederick, Duke of Württemberg-Montbéliard
Louis Frederick of Württemberg- Montbéliard( 29 January 1586 in Montbéliard – 26 January 1631 in Montbéliard) was the founder of a cadet line of the House of Württemberg known as the Dukes of Württemberg- Montbéliard.
Louis Frederick of Württemberg was born at Montbéliard Castle as the fifth child and second son of Duke Frederick I of Württemberg, and princess Sibylla of Anhalt.
Duchess Louise Frederica of Württemberg
Duchess Louise Frederica of Württemberg (3 February 1722 – 2 August 1791) was a Duchess consort of Mecklenburg-Schwerin.
She was the daughter of Frederick Louis, Hereditary Prince of Württemberg and Margravine Henrietta Maria of Brandenburg-Schwedt.
She married Frederick II, Duke of Mecklenburg on 2 March 1746.
She had four children, who died young.
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 Augusta of Württemberg
Princess Augusta of Württemberg( 4 October 1826 in Stuttgart – 3 December 1898, ibid.) was a daughter of King William I of Württemberg and his wife, Pauline of Württemberg.
Duchess Frederica of Württemberg
Duchess Frederica of Württemberg( 27 July 1765 – 24 November 1785) was a daughter of Frederick II Eugene, Duke of Württemberg and Friederike Dorothea of Brandenburg- Schwedt.
Christoph, Duke of Württemberg
Christoph of Württemberg, Duke of Württemberg (12 May 1515 – 28 December 1568) ruled as Duke of Württemberg from 1550 until his death in 1568.
Pauline Therese of Württemberg
Pauline of Württemberg (4 September 1800 – 10 March 1873) was a daughter of Duke Louis of Württemberg and Princess Henriette of Nassau-Weilburg.
She married her first cousin King William I of Württemberg and was his consort.
Prince Frederick of Württemberg
Prince" Frederick" Charles Augustus of Württemberg( 21 February 1808 – 9 May 1870) was a General in the Army of Württemberg and the father of William II of Württemberg.
Frederick was a member of the Royal Family of Württemberg and a Prince of Württemberg.
Frederick Augustus, Duke of Württemberg-Neuenstadt
Frederick Augustus of Württemberg-Neuenstadt (Neuenstadt am Kocher, 12 March 1654 – 6 August 1716 in Gochsheim) was Duke of Württemberg and second Duke of Württemberg-Neuenstadt.

Question: What is the date of death of Duchess Louise Frederica Of Württemberg's mother?
Answer: 7 May 1782