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.
George Tuchet, 1st Earl of Castlehaven
George Tuchet, 1st Earl of Castlehaven (c. 1551 – 1617), was the son of Henry Tuchet, 10th Baron Audley (died 1563) and his wife, née Elizabeth Sneyd.
He succeeded his father as 11th Baron Audley and 8th Baron Tuchet on 30 December 1563, and served in the Parliament of England from 30 September 1566 to 5 April 1614.
He was a Fellow of Magdalen College, Oxford.
He was Governor of Utrecht in the Netherlands, and Governor of Kells, County Meath, Ireland.
He was wounded at the Battle of Kinsale, 24 December 1601.
He resided primarily in Ireland and was summoned by writ to the Irish House of Lords 11 March 1613/1614.
He was created 1st Baron Audley of Orier (County Armagh) and 1st Earl of Castlehaven (County Cork) on 6 September 1616 in the Peerage of Ireland.
In the late 1570s or early 1580s he married Lucy Mervyn, who died on 20 February 1616, only child of Sir James Mervyn and of his wife Amy Clark.
They had seven children:
On 29 August 1611, at St. Mary-le-Strand, Middlesex, he married his second wife, Elizabeth Noel (d. 1644), the daughter of Sir Andrew Noel (d. 1607) and his wife, née Mabel Harington.
The couple had no children.
Comment :- Contradiction on this page
Lucy Mervyn died 20 Feb 1616, he married his 2nd wife Elizabeth Noel on 29 August 1611 ?
The administration of his will was granted to his daughter Eleanor, wife of Sir Archibald Douglas.
He was succeeded as Earl of Castlehaven by his son, Mervyn.
His widow married Sir Piers Crosby on 6 March 1618/1619, and was living in 1644.
Margaret de Stafford
Margaret Stafford( born c. 1364; died 9 June 1396) was the daughter of Hugh de Stafford, 2nd Earl of Stafford, and Philippa de Beauchamp.
She was the first wife of Ralph Neville, 1st Earl of Westmorland, and the grandmother of the 2nd Earl.
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.
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:
George Anselm Touchet
George Anselm Touchet, also spelt Tuchet,( died 1689 or earlier) was the Roman Catholic chaplain of Queen Catherine of Braganza, the wife of King Charles II.
The second son of Mervyn Tuchet, 2nd Earl of Castlehaven, by his marriage to Elizabeth Barnham, and a younger brother of James Tuchet, 3rd Earl of Castlehaven, Touchet began life as George Tuchet in Stalbridge, Dorset.
In 1631, his father was convicted and executed for various sexual crimes, including rape and sodomy.
In 1643 Touchet became a Benedictine monk at St Gregory's, Douai, and was clothed a monk under the name of Anselm.
After the Restoration of the Stuarts he was made chaplain to Queen Catherine, with an apartment at St James's Palace and subsequently another at Somerset House, and with an allowance of £ 100 a year.
Touchet's" Historical collections", a work of Catholic controversy, appeared in 1674, and he was banished from England the following year.
In 1682 he was debarred by an Act of Parliament from succeeding to his brother's earldom and estates.
An abridged version of his manuscript translation of a devotional work by the French mystic Constantine Barbanson( 1581 –1632) was published in 1928 as" The Secret Paths of Divine Love".
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.
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.
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.
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.

Question: Who is Mervyn Tuchet, 2Nd Earl Of Castlehaven's paternal grandmother?
Answer: Elizabeth Sneyd