List of Famous people who died in 1921

Teresa "Teresina" Brambilla was an Italian soprano who sang in the major opera houses of Europe in a career spanning 25 years. She was particularly noted for her interpretations of the leading roles in operas by Amilcare Ponchielli whom she married in 1874.

Gyorche Petrov Nikolov born Georgi Petrov Nikolov, was a Bulgarian revolutionary, one of the leaders of the Bulgarian Macedonian-Adrianople Revolutionary Committees. Despite his Bulgarian self-identification, according to the post-World War II Macedonian historiography, he was an ethnic Macedonian.

Arthur Charles Cooper was a member of the Queensland Legislative Assembly.

François-Marie-Anatole de Rovérié de Cabrières was a French Cardinal of the Roman Catholic Church. He served as Bishop of Montpellier from 1874 until his death, and was elevated to the cardinalate in 1911.

Giovanni Arcangeli was an Italian botanist from Florence.

Władysław Marcjan Mikołaj Żeleński was a Polish composer, pianist and organist.

Zachary Taylor was a U.S. Representative from Tennessee.

Marie Georges Humbert was a French mathematician who worked on Kummer surfaces and the Appell–Humbert theorem and introduced Humbert surfaces. His son was the mathematician Pierre Humbert. He won the Poncelet Prize of the Académie des Sciences in 1891.