 Duncombe died unmarried at Teddington on 9 April 1711, and was described as ‘the richest commoner of England’.His brother, [[Anthony Duncombe]], was also MP for Hedon, died before him.His nephew and heir, also called [[Anthony Duncombe, 1st Baron Feversham|Anthony]], was later ennobled as [[Baron Feversham|Lord Feversham]].