On her death, the Earldom of de Grey and the Barony of Lucas passed under their respective remainders to her nephew, the 3rd Baron Grantham, who became 2nd Earl de Grey and 6th Baron Lucas.
Baron Grantham, created in the Peerage of Great Britain in 1761, merged with the title Earl de Grey from 1833 and extinct in 1923.
Grey's Anatomy | James Earl Jones | Prince Edward, Earl of Wessex | Louis Mountbatten, 1st Earl Mountbatten of Burma | Herbert Kitchener, 1st Earl Kitchener | Grey Cup | Earl | Frederick Roberts, 1st Earl Roberts | Earl of Derby | Earl Warren | Earl of Pembroke | Robert Harley, 1st Earl of Oxford and Earl Mortimer | Earl of Warwick | Zane Grey | Thomas Wentworth, 1st Earl of Strafford | Grey Heron | Edward Smith-Stanley, 14th Earl of Derby | Earl of Shrewsbury | William Pitt, 1st Earl of Chatham | Simon de Montfort, 6th Earl of Leicester | Richard Neville, 16th Earl of Warwick | Earl of Leicester | John Scott, 1st Earl of Eldon | Robert Devereux, 2nd Earl of Essex | Robert, 1st Earl of Gloucester | Edward Harley, 2nd Earl of Oxford and Earl Mortimer | Earl of Devon | Douglas Haig, 1st Earl Haig | My Name Is Earl | Edward Hyde, 1st Earl of Clarendon |
In 1833 he succeeded his aunt as second Earl de Grey according to a special remainder and also inherited the Wrest Park estate in Silsoe, Bedfordshire.