List of Famous people who died at 91

Leonhard Deininger was a German politician, representative of the Christian Social Union of Bavaria.

Karel Otčenášek was a Czech prelate of the Roman Catholic Church.

Brebis Bleaney CBE FRS was a British physicist. His main area of research was the use of microwave techniques to study the magnetic properties of solids. He was head of the Clarendon Laboratory at the University of Oxford from 1957 to 1977. In 1992, Bleaney received the International Zavoisky Award "for his contribution to the theory and practice of electron paramagnetic resonance of transition ions in crystals."

Francis Otto Schmitt was an American biologist and Institute Professor at the Massachusetts Institute of Technology.

Robert Fabre was a French politician and pharmacist.

Marais Viljoen, was the last ceremonial State President of South Africa from 4 June 1979 until 3 September 1984. Viljoen became the last of the ceremonial presidents of South Africa when he was succeeded in 1984 by Prime Minister P. W. Botha, who combined the offices into an executive presidency.