Previously, in 1661, the title was created for Edward Hyde, but it became extinct at the death of the fourth Earl, there being no male heirs remaining. It was again bestowed upon Thomas Villiers, the husband of the last Earl's granddaughter, in 1776.
The subsidiary title belonging to the Earl is Baron Hyde, created in 1756. The title is used as a courtesy title for the eldest son of the Earl.
Earls of Clarendon, first Creation (1661)
Earls of Clarendon, second Creation (1776)