Cornwallis needs to be distinguished from two of his kinsmen, one being Thomas Cornwallis II, who came from a Hampshire branch of the family, while the other was a younger son of Sir Charles Cornwallis, who settled in Lincoln. However, neither namesake was sufficiently closely connected with Suffolk to secure election as knight of the shire.
Cornwallis’ father married John Blennerhasset, who was employed in the management of the Howard estates in Suffolk, and it was probably as a result of this connection that the former was able to purchase both the manor of Earl Soham, three miles from Framlingham, and other property from the Howards.
Stanhope, a prominent Suffolk courtier and landowner, appointed Cornwallis and Sir Lionel Tollemache* executors of his will. The former died in late 1621, giving his executors control over his estate for three years after his death, which responsibility undoubtedly substantially increased Cornwallis’s status.
Cornwallis drew up his will on 25 July 1625, during the recess following the adjournment to Oxford, in which he declared that he was in ‘full, perfect and sound health’, but aware ‘that we are but pilgrims and strangers upon earth’. The eloquent preamble, claiming ‘sure and certain hope through Jesus Christ’ and ‘a true and lively faith exercised in good works, not as meritorious, but as declarative fruits of faith and its inseparable companions’, confirms a strong, but not necessarily radical, Calvinist faith. He left £45 to be distributed among the poor of 20 Suffolk parishes ‘by my very good friend, Mr. Francis Fowkes’, whom he described as ‘parson of Sproughton’, a parish close to Ipswich. He was presumably the Francis ‘Folkes’ had been minister of Earl Soham in 1600. Cornwallis also made generous bequests to at least a dozen godchildren.
There is no evidence that Cornwallis attended the Parliament when it reconvened at Oxford, nor is he known to have sought re-election in 1626. He died on 23 Apr. 1627, after compiling a list of Forced Loan defaulters, and was buried at Cretingham. In accordance with a settlement of 26 Nov. 1619, the bulk of his estate was divided between his cousin John, the younger brother of Thomas Cornwallis II*, and his three nieces, the daughters of his sister Elizabeth Corderoy. No later members of this branch of the Cornwallis family sat at Westminster.
