The Grosvenors of Eaton, near Chester, were a Cheshire family of great antiquity and substantial fortune, derived mainly from Welsh lead mines. In 1676 Sir Thomas Grosvenor, 3rd Bt., married the heiress to London estates covering a large part of modern Mayfair, Belgravia, and Pimlico, which increased the Grosvenor income from about £4,500 to £22,000 p.a. in 1742. He died in 1700, leaving three minor sons, Richard, Thomas and Robert, and a daughter Anne (m. William Leveson Gower), who all grew up under the care of Francis Cholmondeley, M.P., uncle of Charles Cholmondeley of Vale Royal, their mother having become mentally deranged.
Grosvenor was present in September 1715 at a meeting of the Jacobite Cheshire Club, which decided against taking part in the rebellion.
The several new streets designed in Grosvenor Buildings in the Parish of St. George, Hanover Square, and lying between New Bond Street and Hyde Park were last week particularly named; upon which occasion Sir Richard Grosvenor, Bart, gave a very splendid entertainment to his tenants and others concerned with those buildings ... In the centre of those new buildings there is now making a new square called Grosvenor Square [with gardens designed by William Kent], which for its largeness and beauty will far exceed any yet made in or about London.
Quoted in N & Q. (ser. II), iv, 327, 414-15.
He died 12 July 1732.
