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:
Lady Mary Tuchet
James (d. 1700)
John Tuchet :- reported as marrying Elizabeth Savile, daughter of Thomas Savile 1st husband of Anne Villiers, daughter of Christopher Villiers 1st Earl of Anglesey by his wife Elizabeth Sheldon
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,