A peerage of the Kingdom of Great Britain.
Letters patent issued on Mon 4th Aug 1766
To William Pitt as Hereditary peerage subsidiary to another created by the same letters patent.
|Number||Surname||Forenames||Held from||Held to|
|1st||Pitt||William||Mon 4th Aug 1766||Mon 11th May 1778|
|2nd||Pitt||John||Mon 11th May 1778||Thu 24th Sep 1835|
Peerage extinct on Thu 24th Sep 1835 with the 2nd holder .