John Lowther, 1st Viscount Lonsdale

John Lowther, 1st Viscount Lonsdale, PC FRS (25 April 165510 July 1700 ), known as Sir John Lowther, 2nd Baronet, from 1675 to 1696, was an English politician.

Early life He was born at Hackthorpe Hall, Lowther, Westmorland, the son of Col. John Lowther of Lowther (the eldest son of Sir John Lowther, 1st Baronet) and his wife, Elizabeth Bellingham, daughter of Sir Henry Bellingham, 1st Baronet, of Hilsington, Westmoreland.

He was educated at Sedbergh School before admission to Queen's College, Oxford, where he matriculated in 1670. He was admitted to the Inner Temple in 1671 and called to the Bar in 1677. He was badly injured in a duel in 1691.

Lonsdale wrote in 1688 a brief account of events from the accession of James II to the landing of the Prince of Orange at Torbay, which was later printed as Memoirs of the Reign of James II (in 1808, for private circulation) and again in 1857. The Memoirs reveal no more of Lonsdale's part in events than his public utterances.

Personal life On 3 December 1674, he married Lady Katherine Thynne (1653–1712/3), sister of Thomas Thynne, 1st Viscount Weymouth, and second daughter of Sir Henry Frederick Thynne, 1st Baronet and the former Hon. Mary Coventry (second daughter, by his second wife, of Thomas Coventry, 1st Baron Coventry). Together, they were the parents of:

Richard Lowther, 2nd Viscount Lonsdale (1692–1713), who died a few months after reaching his majority in 1713.

His branch of the Lowther family became extinct when his son Henry, the 3rd viscount, died unmarried in March 1751, and the baronetcy and estates went to his cousin, James Lowther, later the first Earl of Lonsdale.