List of Famous people who died at 86

Gordon Adams Daniel was an English sound editor, with 51 different films from 1955 to 1988. He won the Academy Award for the film Grand Prix for Best Sound Editing at the 39th Academy Awards.

John Arthur Todd FRS was a British geometer.

Sicco Leendert Mansholt was a Dutch politician and diplomat of the defunct Social Democratic Workers' Party (SDAP) and later the Labour Party (PvdA) and farmer who served as the President of the European Commission from 1 March 1972 until 5 January 1973.

Jean Alexandre Eugène Dieudonné was a French mathematician, notable for research in abstract algebra, algebraic geometry, and functional analysis, for close involvement with the Nicolas Bourbaki pseudonymous group and the Éléments de géométrie algébrique project of Alexander Grothendieck, and as a historian of mathematics, particularly in the fields of functional analysis and algebraic topology. His work on the classical groups, and on formal groups, introducing what now are called Dieudonné modules, had a major effect on those fields.

Hugh Hunt was an American set decorator. He won two Academy Awards and was nominated for eleven more in the category Best Art Direction.

Margaret Rose Mount OBE was an English actress. As a child she found acting an escape from an unhappy home life. After playing in amateur productions, she was taken on by a repertory company and spent nine years in various British towns, learning her craft. In 1955 she got her big break in the comic play Sailor Beware!: she created the leading role in a repertory production and, though unknown to London audiences, was given the part when the play was presented in the West End. She became known for playing domineering middle-aged women in plays, films and television shows.

Eugenio Giuseppe Togliatti was an Italian mathematician, brother of politician Palmiro Togliatti.He was a researcher at the ETH Zurich from 1924 to 1926. He discovered Togliatti surfaces.