Question: Who is the paternal grandfather of John Vanden-Bempde-Johnstone?

Knowledge 1: John Vanden-Bempde-Johnstone
Sir John Vanden-Bempde-Johnstone, 2nd Baronet (28 August 1799 – 24 February 1869) was a British Member of Parliament.Vanden-Bempde-Johnstone was the son of Sir Richard Vanden-Bempde-Johnstone, 1st Baronet.He succeeded as second Baronet in 1807, at the age of seven, on the death of his father.In 1830 he was elected to the House of Commons for Yorkshire as a Whig, a seat he held until the constituency was abolished in 1832.The latter year he was returned for Scarborough.During the 1835 parliament he defected from the Whigs to the Conservatives, and lost his seat in 1837, but regained it in 1841, and continued to represent the constituency until his death 28 years later.However, from 1857 he sat as a Liberal.Vanden-Bempde-Johnstone married Louisa Augusta Venables-Vernon-Harcourt, daughter of the Most Reverend Edward Harcourt, Archbishop of York.He died, from injuries in a hunting accident, in February 1869, aged 69, and was succeeded in the baronetcy by his eldest son Harcourt, who also succeeded him as Member of Parliament for Scarborough and who was elevated to the peerage as Baron Derwent in 1881.Lady Vanden-Bempde-Johnstone survived her husband by less than half a year, and died in August 1869. [SEP] Knowledge 2: Richard Vanden-Bempde-Johnstone
Sir Richard Vanden-Bempde-Johnstone, 1st Baronet (21 September 1732 – 14 July 1807) was a British Member of Parliament.Born Richard Johnstonehe was the son of Colonel John Johnstone (d. 1741),second son of Sir William Johnstone, 2nd Baronet, of Westerhall.His mother was Charlotte, daughter of John van den Bempde of Hackness Hall in Hackness, near Scarborough, Yorkshire.In 1793 he assumed by Act of Parliament his maternal grandfather's surname of Vanden-Bempde but in 1795 he was authorised by Royal licence to resume the name of Johnstone in addition to those of Vanden-Bempde.Vanden-Bampde-Johnstone was elected to the House of Commons for Weymouth in 1790, a seat he held until 1796.In 1795 he was created a Baronet, of Hackness Hall in the North Riding of the County of York.He died in July 1807, aged 74, and was succeeded in the baronetcy by his son John.His grandson Sir Harcourt Vanden-Bempde-Johnstone, 3rd Baronet, was raised to the peerage as Baron Derwent in 1881.
Knowledge 1: John Vanden-Bempde-Johnstone
Sir John Vanden-Bempde-Johnstone, 2nd Baronet (28 August 1799 – 24 February 1869) was a British Member of Parliament.Vanden-Bempde-Johnstone was the son of Sir Richard Vanden-Bempde-Johnstone, 1st Baronet.He succeeded as second Baronet in 1807, at the age of seven, on the death of his father.In 1830 he was elected to the House of Commons for Yorkshire as a Whig, a seat he held until the constituency was abolished in 1832.The latter year he was returned for Scarborough.During the 1835 parliament he defected from the Whigs to the Conservatives, and lost his seat in 1837, but regained it in 1841, and continued to represent the constituency until his death 28 years later.However, from 1857 he sat as a Liberal.Vanden-Bempde-Johnstone married Louisa Augusta Venables-Vernon-Harcourt, daughter of the Most Reverend Edward Harcourt, Archbishop of York.He died, from injuries in a hunting accident, in February 1869, aged 69, and was succeeded in the baronetcy by his eldest son Harcourt, who also succeeded him as Member of Parliament for Scarborough and who was elevated to the peerage as Baron Derwent in 1881.Lady Vanden-Bempde-Johnstone survived her husband by less than half a year, and died in August 1869. [SEP] Knowledge 2: Sir William Johnstone, 2nd Baronet
Sir William Johnstone, 2nd Baronet( died 8 October 1727) of Sciennes and Westerhall was a Scottish landowner and politician who sat in the Parliament of Scotland from 1698 to 1707 and in the British House of Commons between 1707 and 1722.
Knowledge 1: John Vanden-Bempde-Johnstone
Sir John Vanden-Bempde-Johnstone, 2nd Baronet (28 August 1799 – 24 February 1869) was a British Member of Parliament.Vanden-Bempde-Johnstone was the son of Sir Richard Vanden-Bempde-Johnstone, 1st Baronet.He succeeded as second Baronet in 1807, at the age of seven, on the death of his father.In 1830 he was elected to the House of Commons for Yorkshire as a Whig, a seat he held until the constituency was abolished in 1832.The latter year he was returned for Scarborough.During the 1835 parliament he defected from the Whigs to the Conservatives, and lost his seat in 1837, but regained it in 1841, and continued to represent the constituency until his death 28 years later.However, from 1857 he sat as a Liberal.Vanden-Bempde-Johnstone married Louisa Augusta Venables-Vernon-Harcourt, daughter of the Most Reverend Edward Harcourt, Archbishop of York.He died, from injuries in a hunting accident, in February 1869, aged 69, and was succeeded in the baronetcy by his eldest son Harcourt, who also succeeded him as Member of Parliament for Scarborough and who was elevated to the peerage as Baron Derwent in 1881.Lady Vanden-Bempde-Johnstone survived her husband by less than half a year, and died in August 1869. [SEP] Knowledge 2: Patrick Vanden-Bempde-Johnstone, 4th Baron Derwent
Patrick Robin Gilbert Vanden- Bempde- Johnstone, 4th Baron Derwent( 26 October 1901 – 2 January 1986), was a British peer and Conservative politician.Derwent was the younger son of Hon. Edward Henry Vanden- Bempde- Johnstone, younger son of Harcourt Vanden- Bempde- Johnstone, 1st Baron Derwent.His mother was Evelyn Mary Agar- Ellis.He was educated at Charterhouse School.He succeeded as fourth Baron Derwent on the death of his elder brother in 1949 and was able to take a seat in the House of Lords.In September 1962 Derwent was appointed Minister of State for Trade in the Conservative government of Harold Macmillan, and when Sir Alec Douglas- Home became Prime Minister in October 1963 he was promoted to Minister of State for Home Affairs.He retained this post until the Conservative loss in the 1964 general election.He never held ministerial office again but served for many years as a Deputy Speaker in the House of Lords.Lord Derwent married Marie- Louise Henriette Picard, daughter of Albert Picard of Paris, France, in 1929.He died in January 1986, aged 84, and was succeeded in the barony by his son Robin Evelyn Leo Vanden- Bempde- Johnstone.

Answer: John Johnstone