Dame Margot Fonteyn de Arias, DBE (18 May 1919 – 21 February 1991), was an English ballerina. She spent her entire career as a dancer with the Royal Ballet, eventually being appointed Prima Ballerina Assoluta of the company by Queen Elizabeth II.
Fonteyn was born Margaret Evelyn Hookham on 18 May 1919 in Reigate, Surrey. Her father was a British engineer; among his family were people in literature and music. Her mother was half Irish and half Brazilian, the daughter of Brazilian industrialist Antonio Fontes. Very early in her career, Margaret took the name by which she was known for all of her professional life, "Margot Fonteyn". The surname, which was also adopted by her brother, was derived from "Fontes" — in Portuguese, "fonte" means "fountain". In Middle and modern English, it is translated as "fonteyn". Her later formal married name was "Margot Fonteyn de Arias", in the Spanish-language tradition.