[1] Willoughby succeeded his father some time between July 1538 and October 1540, and was knighted in January 1542.

[1] He was then raised to the peerage under letters patent on 16 February 1547, with the remainder to his heirs male of body.

[3] The creation of the barony gave the right to a hereditary peerage and seat in the House of Lords.

By her first marriage Margaret had an only son, Sir Edward Devereux, 1st Baronet.

On his death on 30 July 1570 at Minting Park, Lincolnshire, he was interred at Parham Church, Suffolk, and was succeeded by his only son Charles.