List of Famous people who died at 86

Moritz, Landgrave of Hesse was the son of Prince Philip, Landgrave of Hesse, and the head of the House of Brabant and the German House of Hesse.

Raffaele Vallone OMRI was an Italian actor, footballer, and journalist.

Alexander Grothendieck was a mathematician who became the leading figure in the creation of modern algebraic geometry. His research extended the scope of the field and added elements of commutative algebra, homological algebra, sheaf theory and category theory to its foundations, while his so-called "relative" perspective led to revolutionary advances in many areas of pure mathematics. He is considered by many to be the greatest mathematician of the 20th century.

Conrad Brooks was an American actor.

Roger Piantoni was a French international footballer. He was the star, inside-forward on the French team in the late 1950s. During the 1949–1950 season, he was the champion of Lorraine with his team, and was the top scorer in the league with 35 goals. At the 1958 World Cup, Piantoni was considered one of the best French players of his time. He was nicknamed Bout d'chou, meaning "Cabbage Tip", ranking as the sixth top scorer in the French Championship with a total of 203 goals in Division 1.

John Francis Burns was an American comedian, actor, voice actor, writer, and producer. During the 1960s, he was part of two comedy partnerships, first with George Carlin and later Avery Schreiber. By the 1970s, he had transitioned to working behind the camera as a writer and producer on such comedy series as The Muppet Show and Hee Haw.

Gabriel "Gabe" Cazares was a mayor of Clearwater, Florida, a Pinellas County commissioner, a civil rights advocate, and a critic of the Church of Scientology. He died September 29, 2006 in Clearwater at the age of 86.

Lionel Blue was a British Reform rabbi, journalist and broadcaster, described by The Guardian as "one of the most respected religious figures in the UK". He was best known for his longstanding work with the media, most notably his wry and gentle sense of humour on Thought for the Day on BBC Radio 4's Today programme. He was the first British rabbi publicly to declare his homosexuality.

Glenn Theodore Seaborg was an American chemist whose involvement in the synthesis, discovery and investigation of ten transuranium elements earned him a share of the 1951 Nobel Prize in Chemistry. His work in this area also led to his development of the actinide concept and the arrangement of the actinide series in the periodic table of the elements.

Edith Hancke was a German stage, film and television actress.