Earl Kenneth Mackenzie, 1st and last Earl of Seaforth

http://en.wikipedia.org/wiki/Kenneth_Mackenzie,_1st_Earl_of_Seaforth

Marriage to Caroline Stanhope 1765 8 Oct — Age: 21
St. Martin-in-the-Fields, Westminster, Middlesex, England

Mackenzie married first Lady Caroline Stanhope (1747–1767), daughter of William Stanhope, 2nd Earl of Harrington Title 1766 — Age: 22

Mackenzie was created Viscount Fortrose and Baron Ardelve in the Peerage of Ireland on 18 November 1766

Occupation 1768 — Age: 24 He was a Member of Parliament for Buteshire and Caithness from 1768 to 1774

Title 1771 3 Dec — Age: 27

December 1771, he was created Earl of Seaforth (a new peerage, also in the Peerage of Ireland). Occupation

1772 12 Nov — Age: 28

Mackenzie was elected a Fellow of the Royal Society Military

1778 — Age: 34 He was commissioned lieutenant-colonel and raised a regiment, the Seaforth (Highland) Regiment in 1778 Military

1778 — Age: 34 Kenneth raised the regiment of Highlanders, the 78th (later known as 72nd) in 1778, known later as the 1st battalion of the Seaforth Highlanders.

Death 1781 27 Aug — Age: 37 At sea He died in August 1781 at age 37, without male issue.On his death, his titles became extinct

Title 1781 — Age: 37 Kenneth Mackenzie was created Earl of Seaforth in 1771, but his peerage became extinct when he died in August 1781. Although there were still heirs to the older earldom, this remained under attainder

http://trees.ancestry.com/tree/17995240/person/18019104788?ssrc=