Question: Who is the paternal grandmother of Jocelyn Sidney, 7Th Earl Of Leicester?

Knowledge 1: Jocelyn Sidney, 7th Earl of Leicester
Jocelyn Sidney, 7th Earl of Leicester (1682 – 7 July 1743) was a British peer, known as Hon.Jocelyn Sidney until 1737.He was the son of Robert Sidney, 4th Earl of Leicester and Lady Elizabeth Egerton.He was educated at University College, Oxford University.In 1734, he was appointed Chief Porter of the Tower of London by his older brother John Sidney, 6th Earl of Leicester, then Constable of the Tower.He succeeded his brother in that year, but died without legitimate issue in 1743, when the titles of Earl of Leicester and Viscount Lisle became extinct.Jocelyn's illegitimate daughter Lady Anne Sidney married Henry Streatfeild of Chiddingstone, Kent on 25 September 1752.On Sir Jocelyn's death, Henry could potentially have inherited the Penshurst Estate, but after much legal wrangling Henry and Anne only received the income from the Sidneys' Welsh properties - but these were still fairly significant. [SEP] Knowledge 2: Robert Sidney, 4th Earl of Leicester
Robert Sidney, 4th Earl of Leicester (1649 – 11 November 1702) was the son of Philip Sidney, 3rd Earl of Leicester, and the former Lady Catherine Cecil.
Knowledge 1: Jocelyn Sidney, 7th Earl of Leicester
Jocelyn Sidney, 7th Earl of Leicester (1682 – 7 July 1743) was a British peer, known as Hon.Jocelyn Sidney until 1737.He was the son of Robert Sidney, 4th Earl of Leicester and Lady Elizabeth Egerton.He was educated at University College, Oxford University.In 1734, he was appointed Chief Porter of the Tower of London by his older brother John Sidney, 6th Earl of Leicester, then Constable of the Tower.He succeeded his brother in that year, but died without legitimate issue in 1743, when the titles of Earl of Leicester and Viscount Lisle became extinct.Jocelyn's illegitimate daughter Lady Anne Sidney married Henry Streatfeild of Chiddingstone, Kent on 25 September 1752.On Sir Jocelyn's death, Henry could potentially have inherited the Penshurst Estate, but after much legal wrangling Henry and Anne only received the income from the Sidneys' Welsh properties - but these were still fairly significant. [SEP] Knowledge 2: Anne Hankford
Anne Hankford( c. 1431 – 13 November 1485) was the first wife of Thomas Butler, 7th Earl of Ormond( c. 1426- 3 August 1515).She was the great- grandmother of Anne Boleyn
Knowledge 1: Jocelyn Sidney, 7th Earl of Leicester
Jocelyn Sidney, 7th Earl of Leicester (1682 – 7 July 1743) was a British peer, known as Hon.Jocelyn Sidney until 1737.He was the son of Robert Sidney, 4th Earl of Leicester and Lady Elizabeth Egerton.He was educated at University College, Oxford University.In 1734, he was appointed Chief Porter of the Tower of London by his older brother John Sidney, 6th Earl of Leicester, then Constable of the Tower.He succeeded his brother in that year, but died without legitimate issue in 1743, when the titles of Earl of Leicester and Viscount Lisle became extinct.Jocelyn's illegitimate daughter Lady Anne Sidney married Henry Streatfeild of Chiddingstone, Kent on 25 September 1752.On Sir Jocelyn's death, Henry could potentially have inherited the Penshurst Estate, but after much legal wrangling Henry and Anne only received the income from the Sidneys' Welsh properties - but these were still fairly significant. [SEP] Knowledge 2: Tjuyu
Tjuyu( sometimes transliterated as Thuya or Thuyu) was an Egyptian noblewoman and the mother of queen Tiye, and the wife of Yuya.She is the grandmother of Akhenaten, and great grandmother of Tutankhamun.

Answer: Lady Catherine Cecil