List of Famous people who died at 91

Leo Jozef Suenens was a Belgian prelate of the Roman Catholic Church. He served as Archbishop of Mechelen-Brussel from 1961 to 1979, and was elevated to the cardinalate in 1962.

Yukio Hayashida was a Japanese politician and former member of the House of Councillors. Hayashida served as the governor of Kyoto from April 16, 1978 until April 15, 1986. He later became the Minister of Justice from November 6, 1987 to December 27, 1988.

Georg Leber was a German Trades Union leader and a politician in the Social Democratic Party of Germany (SPD).

Adolf Friedrich Johann Butenandt was a German biochemist. He was awarded the Nobel Prize in Chemistry in 1939 for his "work on sex hormones." He initially rejected the award in accordance with government policy, but accepted it in 1949 after World War II. He was President of the Max Planck Society from 1960 to 1972. He was also the first, in 1959, to discover the structure of the sex pheromone of silkworms which he named as bombykol.

David Harold Blackwell was an American statistician and mathematician who made significant contributions to game theory, probability theory, information theory, and Bayesian statistics. He is one of the eponyms of the Rao–Blackwell theorem. He was the first African American inducted into the National Academy of Sciences, the first black tenured faculty member at UC Berkeley, and the seventh African American to receive a Ph.D. in Mathematics.