List of Famous people who died in 1991

Aaron Siskind was an American photographer whose work focuses on the details of things, presented as flat surfaces to create a new image independent of the original subject. He was closely involved with, if not a part of, the abstract expressionist movement, and was close friends with painters Mark Rothko, Franz Kline, and Willem De Kooning.

Ole Beich was a Danish musician best known as the bass guitarist for the original lineups of L.A. Guns and Guns N' Roses.

Karl Richard Freiherr Michel von Tüßling was a German Schutzstaffel (SS) officer who served in the Nazi government of dictator Adolf Hitler, in the staff of the Reichsführer SS and in the staff of the SS Main Office. From 1936 onwards, he also was the personal adjutant of Reichsleiter and SS-Obergruppenführer Philipp Bouhler, who was in charge of Hitler's Chancellery, head of the euthanasia programme Aktion T4, as well as co-initiator of Aktion 14f13. In 1947 Tüßling provided an affidavit in defence of war criminal Viktor Brack who was sentenced to death at the Nuremberg trials.

Chiang Hsiao-wu was the second son of Chiang Ching-kuo, the President of the Republic of China in Taiwan from 1978 to 1988. His mother is Faina Ipatyevna Vakhreva, also known as Chiang Fang-liang. He had one older brother, Hsiao-wen, one older sister, Hsiao-chang, and one younger brother, Hsiao-yung. He also had two half-brothers, Winston Chang and John Chiang, with whom he shared the same father.

Baruch Shalom HaLevi Ashlag was a kabbalist, the firstborn and successor of Yehuda Ashlag also known as Baal Hasulam, the author of "The Sulam" commentary on the Zohar. Among his writings: Shlavey ha Sulam, Dargot ha Sulam, Igrot Rabash.

Derrick Henry "Dick" Lehmer, almost always cited as D.H. Lehmer, was an American mathematician significant to the development of computational number theory. Lehmer refined Édouard Lucas' work in the 1930s and devised the Lucas–Lehmer test for Mersenne primes. His peripatetic career as a number theorist, with him and his wife taking numerous types of work in the United States and abroad to support themselves during the Great Depression, fortuitously brought him into the center of research into early electronic computing.

Antônio Vilas-Boas (1934–1991) was a Brazilian farmer who claimed to have been abducted by extraterrestrials in 1957. Though similar stories had circulated for years beforehand, Vilas-Boas' claims were among the first alien abduction stories to receive wide attention. Some skeptics today consider the abduction story to be little more than a hoax, although Boas nonetheless reportedly stuck to his account throughout his life.

Stanley Getz was an American jazz saxophonist, professionally known as Stan Getz. Playing primarily the tenor saxophone, Getz was known as "The Sound" because of his warm, lyrical tone, his prime influence being the wispy, mellow timbre of his idol, Lester Young. Coming to prominence in the late 1940s with Woody Herman's big band, Getz is described by critic Scott Yanow as "one of the all-time great tenor saxophonists". Getz performed in bebop and cool jazz groups. Influenced by João Gilberto and Antônio Carlos Jobim, he popularized bossa nova in America with the hit single "The Girl from Ipanema" (1964).

Sheikh Abdullah Al-Mubarak Al-Sabah was the youngest son of the founder of the modern state of Kuwait Sheikh Mubarak Al-Kabir.

Martha Graham was an American modern dancer and choreographer. Her style, the Graham technique, reshaped American dance and is still taught worldwide.