General Algernon Seymour, 7th Duke of Somerset (11 November 1684 – 7 February 1750) was a British Army officer, Whig politician and peer who sat in the House of Commons from 1708 to 1722 when he was raised to the peerage as Baron Percy and took his seat in the House of Lords.

[2] Seymour was still in Austria when he was returned as Member of Parliament for Marlborough on the recommendation of his father at a by-election on 27 November 1705.

He went to Flanders in the summer of 1708 to serve as a volunteer under the Duke of Marlborough and brought back news of the relief of Brussels in November.

He was returned again for Northumberland at the 1713 British general election and spoke strongly in support of Richard Steele, voting against his expulsion.

[2] Seymour was returned unopposed as Whig MP for Northumberland at the 1715 British general election and proposed Spencer Compton as Speaker on 17 March 1715.

In 1748 Somerset was created Baron Warkworth, of Warkworth Castle in the County of Northumberland, and Earl of Northumberland, with remainder to his son-in-law, Sir Hugh Smithson, 4th Baronet,[5] with the intention that the majority of the Percy estates should descend in this line.

[1] This Thomas Thynne was the first cousin of "Tom of ten thousand", who had been the second husband of Algernon's own mother, Elizabeth.