The Rootes Group or Rootes Motors Limited was a British automobile manufacturer and, separately, a major motor distributors and dealers business. Run from London's West End, the manufacturer was based in the Midlands and the distribution and dealers business in the south of England. In the decade beginning 1928 the Rootes brothers, William and Reginald, made prosperous by their very successful distribution and servicing business, were keen to enter manufacturing for closer control of the products they were selling. One brother has been termed the power unit, the other the steering and braking system.

William Edward Rootes, 1st Baron Rootes GBE was a British motor manufacturer. He opened his first car sales agency in 1913, leading to the global Rootes Group. During the Second World War he supervised the volume manufacture of aircraft and engines, as well as the supply of military motor vehicles and armoured fighting vehicles. He was knighted in 1942 for these services and for organising the reconstruction of bomb-damaged Coventry after its saturation bombing by the Luftwaffe on 14–15 November 1940. In the 1950s, he became a leader of Britain's export drive, and chaired a committee to found the University of Warwick with a vision of academic links with industry. The Rootes Social Building and halls of residence were built at the university c. 1966, named posthumously in his honour.