Question: Who is James Stewart, 1St Duke Of Richmond's paternal grandfather?

Knowledge 1: James Stewart, 1st Duke of Richmond
James Stewart, 1st Duke of Richmond, 4th Duke of Lennox KG (6 April 1612 – 30 March 1655) was a British nobleman.He was the eldest son of Esmé Stewart, 3rd Duke of Lennox and his wife Katherine Clifton, 2nd Baroness Clifton.James Stewart inherited the Dukedom of Lennox on his father's death (30 June 1624) and was made a gentleman of the bedchamber in 1625, and knighted on 29 June 1630.He was invested as a knight of Order of the Garter in 1633.He married Mary Villiers, daughter of George Villiers, 1st Duke of Buckingham on 3 August 1637.A third cousin of Charles I of England, Stewart was a Privy Councillor and key member of Royalist party in the English Civil War.In 1641–42, he served as Lord Warden of the Cinque Ports.He spent five months in exile in 1643, returning to England to defend the city of Oxford for the king.He died on 30 March 1655 at age 42 and was buried in Westminster Abbey. [SEP] Knowledge 2: Esmé Stewart, 3rd Duke of Lennox
Esmé Stewart, 3rd Duke of Lennox KG (157930 July 1624) was the son of Esmé Stewart, 1st Duke of Lennox and Catherine de Balsac.He was a patron of the playwright Ben Jonson, who lived in his household for five years.At the death of his brother the 2nd Duke of Lennox, he was already Earl of March and Lord Clifton of Leighton Bromswold in the peerage of England (1619) as well as 7th Seigneur d'Aubigny.On 9 February 1608 he performed in the masque"The Hue and CryAfter Cupid" at Whitehall Palace as a sign of the zodiac, to celebrate the wedding of John Ramsay, Viscount Haddington to Elizabeth Radclyffe .He married Katherine Clifton, 2nd Baroness Clifton, in 1609.They had eleven children:He died in 1624 and was interred, on 6 August 1624, in Westminster Abbey.
Knowledge 1: James Stewart, 1st Duke of Richmond
James Stewart, 1st Duke of Richmond, 4th Duke of Lennox KG (6 April 1612 – 30 March 1655) was a British nobleman.He was the eldest son of Esmé Stewart, 3rd Duke of Lennox and his wife Katherine Clifton, 2nd Baroness Clifton.James Stewart inherited the Dukedom of Lennox on his father's death (30 June 1624) and was made a gentleman of the bedchamber in 1625, and knighted on 29 June 1630.He was invested as a knight of Order of the Garter in 1633.He married Mary Villiers, daughter of George Villiers, 1st Duke of Buckingham on 3 August 1637.A third cousin of Charles I of England, Stewart was a Privy Councillor and key member of Royalist party in the English Civil War.In 1641–42, he served as Lord Warden of the Cinque Ports.He spent five months in exile in 1643, returning to England to defend the city of Oxford for the king.He died on 30 March 1655 at age 42 and was buried in Westminster Abbey. [SEP] Knowledge 2: Ernest Blackie
Ernest Morell Blackie( 19 August 1867 – 1943) was an Anglican bishop in the 20th century.Blackie was born in Leamington Spa and educated at Cheltenham Grammar School and the University of London.Ordained in 1891, he was a curate at St Mark's Gloucester and then a minor canon at Rochester Cathedral until 1900.He later became the rector of Limpsfield and then St Paul's York Place, Edinburgh before becoming the vicar of Windsor and an Honorary Chaplain to the King.From 1921 to 1937 he was a residentiary canon at Lincoln Cathedral and for seven years a suffragan bishop in the Diocese of Lincoln( five as Suffragan Bishop of Grantham and two as Bishop of Grimsby) before his final appointment as Dean of Rochester, a position he held until his death in 1943.In 1903 Blackie married Caroline Stewart, daughter of James Haldane Stewart Jr. and Emily Leveson- Gower of Titsey Place.Her father was the son of James Haldane Stewart senior( the 19th century ecumenical prelate) and Mary Dale, daughter of David Dale.Emily Leveson- Gower was a member of one of Britain's most aristocratic families and was a descendant of Thomas Howard, 4th Duke of Norfolk, Edmund Beaufort, 4th Duke of Somerset, Edward Seymour, 1st Duke of Somerset, Charles Brandon, 1st Duke of Suffolk, Henry Cavendish, 2nd Duke of Newcastle- upon- Tyne, Clarence, Thomas Tufton, 6th Earl of Thanet, George Plantagenet, 1st Duke of Clarence, Richard Neville, 16th Earl of Warwick or Warwick the Kingmaker William Russell, 1st Duke of Bedford and John Manners, 1st Duke of Rutland, William Cecil, 1st Baron Burghley, Thomas Cromwell, 1st Earl of Essex as well as Henry VII of England and James V of Scotland.
Knowledge 1: James Stewart, 1st Duke of Richmond
James Stewart, 1st Duke of Richmond, 4th Duke of Lennox KG (6 April 1612 – 30 March 1655) was a British nobleman.He was the eldest son of Esmé Stewart, 3rd Duke of Lennox and his wife Katherine Clifton, 2nd Baroness Clifton.James Stewart inherited the Dukedom of Lennox on his father's death (30 June 1624) and was made a gentleman of the bedchamber in 1625, and knighted on 29 June 1630.He was invested as a knight of Order of the Garter in 1633.He married Mary Villiers, daughter of George Villiers, 1st Duke of Buckingham on 3 August 1637.A third cousin of Charles I of England, Stewart was a Privy Councillor and key member of Royalist party in the English Civil War.In 1641–42, he served as Lord Warden of the Cinque Ports.He spent five months in exile in 1643, returning to England to defend the city of Oxford for the king.He died on 30 March 1655 at age 42 and was buried in Westminster Abbey. [SEP] Knowledge 2: Charles Lennox, 1st Duke of Richmond
Charles Lennox, 1st Duke of Richmond, 1st Duke of Lennox, 1st Duke of Aubigny( 29 July 167227 May 1723), of Goodwood House near Chichester in Sussex, was an illegitimate son of King Charles II by his mistress Louise de Kérouaille, Duchess of Portsmouth.

Answer: Esmé Stewart, 1st Duke of Lennox