Henry Mainwaring in the King's cause in the English Civil War, was exiled to France, and died in poverty. He was buried at St. Giles' Church, Camberwell, London, on 15 May 1653. Mainwaring married a daughter of Sir Thomas Gardiner in 1630. She died in 1633. His brothers were Sir Arthur Mainwaring, Carver to Prince Henry, George Mainwaring, the defender of Tong Castle, and Sir Thomas Mainwaring, the Recorder of Reading. The Mainwaring family was old and distinguished, probably having arrived in England in the train of William the Conqueror (1066). Henry Mainwaring Sir Henry Mainwaring (1587–1653), was an English lawyer, soldier,
Sam Mainwaring intellectual inspiration by the radical British labour leader Tom Mann. In his 1923 memoirs, Mann credited Mainwaring with having been "one of the very first to understand the significance of the revolutionary movement, and the first, as far as my knowledge goes, to appreciate industrial action as distinct from parliamentary action". Mainwaring was the namesake of a nephew whom he adopted, Sam Mainwaring Jr., himself an important radical activist in the international labour movement. Sam Mainwaring Samuel "Sam" Mainwaring (15 December 1841 – 29 September 1907) was a Welsh machinist and socialist political activist who was a founding member and