Earl of Chatham Earl of Chatham Earl of Chatham, in the County of Kent, was a title in the Peerage of Great Britain. It was created in 1766 for William Pitt the Elder on his appointment as Lord Privy Seal, along with the subsidiary title Viscount Pitt, of Burton Pynsent in the County of Somerset, also in the Peerage of Great Britain. The first Earl's wife, the former Lady Hester Grenville, daughter of the 1st Countess Temple, had earlier been created Baroness Chatham, of Chatham in the County of Kent, also in the Peerage of Great Britain, in 1761, as at that stage
Earl of Seaforth would have been the 6th earl, helped the British government during the rising of 1745, and was a member of parliament for some years. His son Kenneth Mackenzie was created Baron of Ardelve and Viscount Fortrose in the Peerage of Ireland in 1766 and Earl of Seaforth in 1771, also in the Peerage of Ireland. However, these peerages became extinct when he died in August 1781. Although there were still heirs to the older earldom, this remained under attainder. Kenneth raised the regiment of Highlanders, the 78th (later known as 72nd) in 1778, known later as the 1st battalion of