On his death, the Earldom of Cowper and its associated titles became extinct, the Barony of Butler became abeyant, and the Barony of Lucas and the Lordship of Dingwall passed to his nephew, Auberon Herbert (a grandson of the 3rd Earl of Carnarvon), who became 9th Baron Lucas and 5th Lord Dingwall. He was confirmed in the titles in 1907 by the Committee for Privileges of the House of Lords. After this, the succession was straightforward, the Barony and Lordship passing to the 9th Baron and 5th Lord's sister Nan Ino Herbert (later Cooper) (the 10th Baroness and 6th Lady), then her daughter (the 11th Baroness and 7th Lady), and then her son (the 12th Baron and 8th Lord), who is the current holder of the titles.