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Roberto Emilio Arias (26 October 1918 – 22 November 1989),^[1] known as "Tito", was a Panamanian international lawyer, diplomat and journalist who was the husband of ballerina Dame Margot Fonteyn. Arias was from a prominent Panamanian political family, whose members had reached the Presidency four times; amongst them his father Harmodio Arias.

Dame Margot Fonteyn, DBE (18 May 1919 – 21 February 1991), stage name of Margaret Evelyn de Arias, was an English ballerina.