The Joel family of England was headed by three brothers, Jack, Woolf and Solomon, who made a fortune in diamond and gold mining in South Africa. Their father was Joel Joel (1836–1893) and their mother Catherine "Kate" Joel née Isaacs (1840–1917), a sister of Barnett Isaacs, later known as Barney Barnato.
As well as being prominent Randlords, several of the Joel family became widely known in thoroughbred horse racing as owner/breeders of numerous winners of British Classic Races.