List of Famous people who died at 66

Nesmith Cornett Ankeny was an American mathematician specialising in number theory.

Rosario "Saro" Urzì was an Italian actor. He is best known for his roles in the films In the Name of the Law (1949), The Railroad Man (1956), Seduced and Abandoned (1964), which earned him a Cannes Film Festival Award for Best Actor, and The Godfather (1972).

Louis Armand was a French engineer who managed several public companies, and had a significant role during World War II as an officer in the Resistance. He was the first chair of Euratom and was elected to the Académie française in 1963.

Benjamin Patrick Aris was an English actor who was best known for his parts in Hi-de-Hi! and To the Manor Born, and was also very active on stage. He was often cast as an eccentric, upper-class, or upper-middle class, man.

Drummond Hoyle Matthews FRS, known as "Drum", was a British marine geologist and geophysicist and a key contributor to the theory of plate tectonics. His work, along with that of fellow Briton Fred Vine and Canadian Lawrence Morley, showed how variations in the magnetic properties of rocks forming the ocean floor could be consistent with, and ultimately help confirm, Harry Hammond Hess's 1962 theory of seafloor spreading. In 1989 he was awarded the Geological Society of London's highest honour, the Wollaston Medal.

Spencer Charles Dryden was an American musician best known as drummer for Jefferson Airplane and New Riders of the Purple Sage. He also played with The Dinosaurs, and The Ashes. He was inducted into the Rock and Roll Hall of Fame in 1996.

Luigi Pistilli was an Italian actor of stage, screen, and television.