Question: Who is the paternal grandfather of Gilbert Kennedy, 4Th Earl Of Cassilis?

Knowledge 1: Gilbert Kennedy, 4th Earl of Cassilis
Gilbert Kennedy, 4th Earl of Cassilis, PC (c. 1541–14 December 1576) was a Scottish peer, the son of Gilbert Kennedy, 3rd Earl of Cassilis.He succeeded to the titles of 6th Lord Kennedy and 4th Earl of Cassillis on 28 November 1558.He fought in the Battle of Langside on 13 May 1568, for the side of Mary, Queen of Scots.He married Margaret Lyon, daughter of John Lyon, 7th Lord Glamis; and became a Protestant after his marriage.They had two legitimate children.Cassilis was known as the "King of Carrick" for the feudal influence he possessed in that region.Cassilis died in 1576 after falling from his horse. [SEP] Knowledge 2: Gilbert Kennedy, 3rd Earl of Cassilis
Gilbert Kennedy, 3rd Earl of Cassilis  (12 May 1515 – 15 November 1558) was Scottish landowner, soldier, politician and judge.He served as Treasurer of Scotland.The son of Gilbert Kennedy, 2nd Earl of Cassilis, he succeeded to the titles of 5th Lord Kennedy and 3rd Earl of Cassillis in August 1527.On 6 February 1540/41 he had a charter of the Fief of Cassilis.As a young man, Kennedy studied at the University of St. Andrews and in Paris under the Scottish humanist George Buchanan for five years.In November, 1542, Kennedy, in his late twenties at the time, was taken prisoner at the Battle of Solway Moss, and after a short stint in the Tower of London, was placed under the care of Thomas Cranmer, Archbishop of Canterbury.Scottish historian Gilbert Burnet (1643-1715) believed that it was this relationship with Cranmer that led Kennedy toward Protestantism,as certainly he was one of the first of the Scottish nobility to adopt Reformed views.However, since his time with Cranmer lasted only one month, it is likely that his earlier contact with Buchanan had been a stronger influence in this regard.Sir Thomas Wharton, Warden of the English West March, wrote to the Privy Council of King Henry VIII, on the tenth of December 1542, regarding ransoms for prisoners taken at the battle, including the Earl of Cassilis, who was taken by Batill Routlege.Credit was also given to John Musgrave who "claimeth a part for the loan of his horse to the said Routlege."Cassilis held the office of Treasurer of Scotland in 1554, of Extraordinary Lord of Session between 1546 and 1558.He fought in the Battle of Pinkie Cleugh on 10 September 1547.In 1558 he was present, as one of the eight Commissioners appointed by the Scottish Parliament, at the marriage of Mary, Queen of Scots, to the Dauphin of France, to whom the Scottish deputies unanimously refused the Crown matrimonial.The Court of France appeared deeply mortified by this disappointment, and the Earl of Cassilis, with two others of the Commissioners, dying in one night, on 28 November 1558, at Dieppe, a report was raised that they had been poisoned, which was further countenanced by the death of a fourth Commissioner, Lord Fleming, at Paris, on 16 December 1558.However, according to the Dictionary of National Biography, this report was untrue, as the actual dates of death of these persons were not the same, Cassilis dying in November.Henry II of France had appointed Gilbert as Gentleman in Ordinary of his Chamber on 4 May 1558, and this honour was transferred to his heir, Gilbert, 4th Earl of Cassilis on 10 February 1559.
Knowledge 1: Gilbert Kennedy, 4th Earl of Cassilis
Gilbert Kennedy, 4th Earl of Cassilis, PC (c. 1541–14 December 1576) was a Scottish peer, the son of Gilbert Kennedy, 3rd Earl of Cassilis.He succeeded to the titles of 6th Lord Kennedy and 4th Earl of Cassillis on 28 November 1558.He fought in the Battle of Langside on 13 May 1568, for the side of Mary, Queen of Scots.He married Margaret Lyon, daughter of John Lyon, 7th Lord Glamis; and became a Protestant after his marriage.They had two legitimate children.Cassilis was known as the "King of Carrick" for the feudal influence he possessed in that region.Cassilis died in 1576 after falling from his horse. [SEP] Knowledge 2: John Kennedy, 5th Earl of Cassilis
John Kennedy, 5th Earl of Cassilis (1575 – 14 November 1615) was a Scottish peer, the son of Gilbert Kennedy, 4th Earl of Cassilis.He succeeded to the titles of 7th Lord Kennedy and 5th Earl of Cassillis on 14 December 1576.In 1596 Kennedy travelled in France and Italy and wrote to Archibald Douglas from Venice.He was one of the central figures in "The Historie Of The Kennedyis", an anonymous account of the feud between the Cassilis and Bargany Kennedy families published in 1830 by Robert Pitcairn.This feud climaxed in a pitched battle in December 1601, in which the Earl's men fatally wounded the Laird of Bargany who was returning home from Ayr.According to the Historie, the Earl also summarily hung a young man named Dalrymple, to whom he was related, for being a closer relation of Bargany's.In most these deeds he was heavily influenced by his Tutor Laird Thomas Kennedy of Culzean, which led to the murder of Culzean, by Bargany's younger brother, Thomas Kennedy of Drummurchie at Greenan Castle on 12 May 1602.He held the office of Treasurer of Scotland on 22 March 1598/99.
Knowledge 1: Gilbert Kennedy, 3rd Earl of Cassilis
Gilbert Kennedy, 3rd Earl of Cassilis  (12 May 1515 – 15 November 1558) was Scottish landowner, soldier, politician and judge.He served as Treasurer of Scotland.The son of Gilbert Kennedy, 2nd Earl of Cassilis, he succeeded to the titles of 5th Lord Kennedy and 3rd Earl of Cassillis in August 1527.On 6 February 1540/41 he had a charter of the Fief of Cassilis.As a young man, Kennedy studied at the University of St. Andrews and in Paris under the Scottish humanist George Buchanan for five years.In November, 1542, Kennedy, in his late twenties at the time, was taken prisoner at the Battle of Solway Moss, and after a short stint in the Tower of London, was placed under the care of Thomas Cranmer, Archbishop of Canterbury.Scottish historian Gilbert Burnet (1643-1715) believed that it was this relationship with Cranmer that led Kennedy toward Protestantism,as certainly he was one of the first of the Scottish nobility to adopt Reformed views.However, since his time with Cranmer lasted only one month, it is likely that his earlier contact with Buchanan had been a stronger influence in this regard.Sir Thomas Wharton, Warden of the English West March, wrote to the Privy Council of King Henry VIII, on the tenth of December 1542, regarding ransoms for prisoners taken at the battle, including the Earl of Cassilis, who was taken by Batill Routlege.Credit was also given to John Musgrave who "claimeth a part for the loan of his horse to the said Routlege."Cassilis held the office of Treasurer of Scotland in 1554, of Extraordinary Lord of Session between 1546 and 1558.He fought in the Battle of Pinkie Cleugh on 10 September 1547.In 1558 he was present, as one of the eight Commissioners appointed by the Scottish Parliament, at the marriage of Mary, Queen of Scots, to the Dauphin of France, to whom the Scottish deputies unanimously refused the Crown matrimonial.The Court of France appeared deeply mortified by this disappointment, and the Earl of Cassilis, with two others of the Commissioners, dying in one night, on 28 November 1558, at Dieppe, a report was raised that they had been poisoned, which was further countenanced by the death of a fourth Commissioner, Lord Fleming, at Paris, on 16 December 1558.However, according to the Dictionary of National Biography, this report was untrue, as the actual dates of death of these persons were not the same, Cassilis dying in November.Henry II of France had appointed Gilbert as Gentleman in Ordinary of his Chamber on 4 May 1558, and this honour was transferred to his heir, Gilbert, 4th Earl of Cassilis on 10 February 1559. [SEP] Knowledge 2: John Kennedy, 5th Earl of Cassilis
John Kennedy, 5th Earl of Cassilis (1575 – 14 November 1615) was a Scottish peer, the son of Gilbert Kennedy, 4th Earl of Cassilis.He succeeded to the titles of 7th Lord Kennedy and 5th Earl of Cassillis on 14 December 1576.In 1596 Kennedy travelled in France and Italy and wrote to Archibald Douglas from Venice.He was one of the central figures in "The Historie Of The Kennedyis", an anonymous account of the feud between the Cassilis and Bargany Kennedy families published in 1830 by Robert Pitcairn.This feud climaxed in a pitched battle in December 1601, in which the Earl's men fatally wounded the Laird of Bargany who was returning home from Ayr.According to the Historie, the Earl also summarily hung a young man named Dalrymple, to whom he was related, for being a closer relation of Bargany's.In most these deeds he was heavily influenced by his Tutor Laird Thomas Kennedy of Culzean, which led to the murder of Culzean, by Bargany's younger brother, Thomas Kennedy of Drummurchie at Greenan Castle on 12 May 1602.He held the office of Treasurer of Scotland on 22 March 1598/99.

Answer: Gilbert Kennedy, 2nd Earl of Cassilis