List of Famous people who died in 1931

Hendrik Maarten Krabbé, or Heinrich Martin Krabbé was a Dutch genre artist and portrait painter.

Mary Charlotte Moore, Lady Wyndham, was an English actress and theatrical manager. She was known for her appearances in comedies alongside the actor-manager Charles Wyndham between 1885 and his retirement in 1913. Over these three decades they acted mainly in contemporary plays, many written for them by authors including Henry Arthur Jones and Hubert Henry Davies, but also appeared in classic comedies together. She continued to act on stage until 1919. She was married to the playwright James Albery from 1879 to 1889, and after his death her relationship with Wyndham eventually became romantic. After the death of Wyndham's estranged wife in 1916, he and Moore married.

Per Axel Rydberg was a Swedish-born, American botanist who was the first curator of the New York Botanical Garden Herbarium.

Ivan Kondakov (1857–1931) was a chemist of Russian heritage working in Estonia, who, as professor of pharmacology of University of Tartu, studied polymerisation and invented synthetic rubber in 1901.

Louis Theodor Kipp was a German jurist who is perhaps best known for his theory of "double nullity", under which a null contract can be challenged in some circumstances. He also made important contributions to family law and inheritance law.

Walter John James, 3rd Baron Northbourne, was an English painter, etcher, and hereditary peer.