Question: Who is Louisa Grace Beauclerk, Duchess Of St Albans's paternal grandfather?

Knowledge 1: Louisa Grace Beauclerk, Duchess of St Albans
Louisa Grace Beauclerk, Duchess of St Albans (1777 – 19 February 1816), formerly Lady Louisa Grace Manners, was the second wife of Aubrey Beauclerk, 6th Duke of St Albans.She was one the youngest of the seven children of John Manners, MP, and his wife Louisa Tollemache, 7th Countess of Dysart.Her nephew, Lionel Tollemache, 8th Earl of Dysart, succeeded her mother in the earldom when the latter died in 1840, aged 95.She married the duke on 15 August 1802 in London, a few months after he succeeded his father in the dukedom.He had previously been married to Jane Moses, who died in 1800, leaving one daughter.The new duchess was said to have been "one of the brightest stars in the fashionable hemisphere" in the early years of her marriage.They had one child, Aubrey Beauclerk, 7th Duke of St Albans (7 April 1815 – 19 February 1816); the duke, described as "a weak and sickly man", died, aged 50, before the child's birth.The duchess died on the same day as her son; both died at the home of her sister, the former Lady Laura Manners, wife of John Dalrymple, in Portman Square, London.Louisa had been "in a delicate state of health" since the death of her husband, and contemporary reports say that she died three hours after the child.Both were buried at Hanwell.The dukedom passed to a younger brother of the 6th Duke. [SEP] Knowledge 2: John Manners (English politician)
John Manners (27 September 1730 – 23 September 1792) was an English politician, and the eldest natural son of Lord William Manners.In 1754, he replaced his father as Member of Parliament for Newark, which he represented until 1774.He married Lady Louisa Tollemache on 4 September 1765, and they had ten children, several of whom adopted the surname of Talmash or Tollemache after it became clear that their mother would inherit the earldom of Dysart:His wife inherited the Tollemache estates in 1820 at the age of 75.She died in 1840.
Knowledge 1: Louisa Grace Beauclerk, Duchess of St Albans
Louisa Grace Beauclerk, Duchess of St Albans (1777 – 19 February 1816), formerly Lady Louisa Grace Manners, was the second wife of Aubrey Beauclerk, 6th Duke of St Albans.She was one the youngest of the seven children of John Manners, MP, and his wife Louisa Tollemache, 7th Countess of Dysart.Her nephew, Lionel Tollemache, 8th Earl of Dysart, succeeded her mother in the earldom when the latter died in 1840, aged 95.She married the duke on 15 August 1802 in London, a few months after he succeeded his father in the dukedom.He had previously been married to Jane Moses, who died in 1800, leaving one daughter.The new duchess was said to have been "one of the brightest stars in the fashionable hemisphere" in the early years of her marriage.They had one child, Aubrey Beauclerk, 7th Duke of St Albans (7 April 1815 – 19 February 1816); the duke, described as "a weak and sickly man", died, aged 50, before the child's birth.The duchess died on the same day as her son; both died at the home of her sister, the former Lady Laura Manners, wife of John Dalrymple, in Portman Square, London.Louisa had been "in a delicate state of health" since the death of her husband, and contemporary reports say that she died three hours after the child.Both were buried at Hanwell.The dukedom passed to a younger brother of the 6th Duke. [SEP] Knowledge 2: Duchess of St Albans
Duchess of St Albans is a title given to the wife of the Duke of St Albans.Women who have held the title include:
Knowledge 1: John Manners (English politician)
John Manners (27 September 1730 – 23 September 1792) was an English politician, and the eldest natural son of Lord William Manners.In 1754, he replaced his father as Member of Parliament for Newark, which he represented until 1774.He married Lady Louisa Tollemache on 4 September 1765, and they had ten children, several of whom adopted the surname of Talmash or Tollemache after it became clear that their mother would inherit the earldom of Dysart:His wife inherited the Tollemache estates in 1820 at the age of 75.She died in 1840. [SEP] Knowledge 2: Charles Beauclerk, 2nd Duke of St Albans
Charles Beauclerk, 2nd Duke of St Albans, KG KB (6 April 1696 – 27 July 1751) was a British politician who sat in the House of Commons from 1718 until 1726 when he succeeded to a peerage as Duke of St Albans.

Answer: Lord William Manners