Mervyn Tuchet, 4th Earl of Castlehaven
Mervyn Tuchet, 4th Earl of Castlehaven (died 2 November 1686) was the third son of Mervyn Tuchet, 2nd Earl of Castlehaven, and his first wife, Elizabeth Barnham (1592 – c. 1622).
He married Mary Talbot (buried 15 March 1710/1), daughter of John Talbot, 10th Earl of Shrewsbury (bef.
1601–1654) and his wife, née Mary Fortesque.
They had at least three children:
He succeeded his brother James as Earl of Castlehaven on 11 October 1684.
He also held the lower titles 14th Baron Audley and 2nd Baron Audley of Hely.
On his death, his titles passed to his son James.
Ralph Neville, 3rd Earl of Westmorland
Ralph Neville, 3rd Earl of Westmorland( c. 1456 – 6 February 1499) was an English peer.
He was the grandfather of Ralph Neville, 4th Earl of Westmorland.
James Tuchet, 5th Earl of Castlehaven
James Tuchet, 5th Earl of Castlehaven( died 12 August 1700) was the son of Mervyn Tuchet, 4th Earl of Castlehaven and Mary Talbot.
He succeeded his father as Earl of Castlehaven on 2 November 1686.
He married Anne Pelson, daughter of Richard Pelson and his wife, née Anne Villiers, daughter of Christopher Villiers, 1st Earl of Anglesey.
They had one son, James, who succeeded him as Earl of Castlehaven.
He died of apoplexy.
His gravestone is in the floor of the south aisle of the retrochoir at Winchester Cathedral.
James Tuchet, 7th Earl of Castlehaven
James Tuchet, 7th Earl of Castlehaven( 15 April 1723 – 6 May 1769) was the son of James Tuchet, 6th Earl of Castlehaven and his wife, née Elizabeth Arundell.
He succeeded his father as Earl of Castlehaven and Baron Audley on 12 October 1740.
He was unmarried, and succeeded on his death in 1769 by his brother, John.
He was a Christian Earl who owned much land and donated parts of the proceeds to the church.
James Tuchet, 3rd Earl of Castlehaven
James Tuchet, 3rd Earl of Castlehaven( c. 1617 – 11 October 1684) was the son of Mervyn Tuchet, 2nd Earl of Castlehaven and his first wife, Elizabeth Barnham( 1592 – c. 1622).
Castlehaven played a prominent role in the Wars of the Three Kingdoms that took place in the middle of the 17th century, and was particularly active in the conflicts in Ireland at this time.
James Tuchet, 6th Earl of Castlehaven
James Tuchet, 6th Earl of Castlehaven( died 12 October 1740) was the son of James Tuchet, 5th Earl of Castlehaven and his wife Anne Pelson.
He succeeded his father as Earl of Castlehaven and Baron Audley on 9 August 1700.
He married, on 14 May 1722, Elizabeth Arundell( 1693 – 1743), daughter of Henry Arundell, 5th Baron Arundell of Wardour and his wife, née Elizabeth Panton.
They had two sons, and at least one daughter:
He is buried at the church of St. Sulpice in Paris, France.
Christopher Nugent, Lord Delvin
Christopher Nugent, Lord Delvin( died before 1680) was the eldest son of Richard Nugent, 2nd Earl of Westmeath.
His brother was Thomas Nugent, 1st Baron Nugent of Riverston.
By his wife, Mary Butler( daughter of Colonel Richard Butler, grandson of Walter Butler, 11th Earl of Ormonde and Lady Frances Tuchet, daughter of Mervyn Tuchet, 2nd Earl of Castlehaven), he had issue:
Mervyn Tuchet, 2nd Earl of Castlehaven
Mervyn Tuchet (sometimes Mervin Touchet), 2nd Earl of Castlehaven (1593 – 14 May 1631), was an English nobleman who was convicted of rape and sodomy and subsequently executed.
A son of George Tuchet, 1st Earl of Castlehaven and 11th Baron Audley, by his wife, Lucy Mervyn, he was known by the courtesy title of Lord Audley during his father's lifetime, so is sometimes referred to as Mervyn Audley.
He was knighted by James I in 1608, before he studied law at the Middle Temple.
He served as Member of the Parliament of England for Dorset in the Addled Parliament of 1614 and was a Justice of the Peace for the counties of Dorset, Somerset, and Wiltshire.
He succeeded his father on 20 February 1616/7 as Earl of Castlehaven and Baron Audley.
He left seven children upon his death.
Sometime before 1612 (records of the marriage are lacking), Lord Audley married Elizabeth Barnham, a sister-in-law of the philosopher and scientist Francis Bacon, and with her he had six children.
By all accounts the marriage was a loving and successful one, ending with her death in 1622.
His second marriage, on 22 July 1624, at Harefield, Middlesex, was to the former Lady Anne Stanley (1580–1647), elder daughter and co-heiress of Ferdinando Stanley, 5th Earl of Derby (by his wife, Alice Spencer), and widow of Grey Brydges, 5th Baron Chandos.
They had a daughter, Anne Touchet, who died young.
Lady Anne was significantly older than Castlehaven, and the marriage was not a success, but in 1628 Lord Castlehaven's son was married to her thirteen-year-old daughter, Elizabeth; a marriage of step-children.
John Tuchet, 8th Earl of Castlehaven
John Talbot Tuchet, 8th Earl of Castlehaven( 2 August 1724 – 22 April 1777) was the son of James Tuchet, 6th Earl of Castlehaven, and his wife, née Elizabeth Arundell.
He succeeded his brother as Earl of Castlehaven and Baron Audley on 6 May 1769.
He died unmarried, at which time the Earldom of Castlehaven and two of its subsidiary titles( Baron Audley of Orier and Baron Audley of Hely) became extinct as the Irish earldom and baronies were entailed honours.
The Barony of Audley created by writ of 1312 is deemed to have devolved upon his nephew, namely George Thicknesse( later Thicknesse- Touchet).
George was the son of his sister Elizabeth, who had married Philip Thicknesse
John Manners, 4th Earl of Rutland
John Manners, 4th Earl of Rutland( c. 1559 – 24 February 1588) was the son of Henry Manners, 2nd Earl of Rutland, and Lady Margaret Neville, daughter of Ralph Neville, 4th Earl of Westmorland.

Question: Who is the paternal grandfather of Mervyn Tuchet, 4Th Earl Of Castlehaven?
Answer: George Tuchet, 1st Earl of Castlehaven