Facts and Events
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 heir was married to her thirteen-year-old daughter Elizabeth.