Ruben Hovsepyan was an Armenian novelist, translator and editor who became politically active in the 1990s, and, as member of the Armenian Revolutionary Federation, served in the National Assembly from 2000 to 2007. He was also a member of the Writers' Union of Armenia (1968).

Rubén Martínez Villena was a Cuban writer and revolutionary leader.

Ruben Santiago-Hudson is an American actor, playwright, and director who has won national awards for his work in all three categories. He is best known for his role of Captain Roy Montgomery from 2009 to 2011 on ABC's Castle. In November 2011 he appeared on Broadway in Lydia R. Diamond's play Stick Fly. In 2013 he starred in the TV series Low Winter Sun, a police drama set in Detroit.

Rupen Chilingiryan (Sevag) (Ռուբէն Յովհաննէսի Չիլինկիրեան (Սեւակ), February 28, 1886, Silivri, Ottoman Empire – August 26, 1915, Çankırı, Ottoman Empire) was an Armenian poet, prose-writer, and doctor. He was sent to a concentration camp along with Siamanto and Daniel Varoujan during the Armenian Genocide.

Rubén Vargas Ugarte was a jesuit priest and Peruvian historian. He was the third president of the Pontifical Catholic University of Peru, and was ordained a priest in the Society of Jesus in 1921. He was also the Director of the National Library of Peru.

Ruby Cohn was an American theater scholar and a leading authority on playwright Samuel Beckett. She was a professor of Comparative Drama at the University of California, Davis for thirty years.

Ruby Jean Jensen was an American author of pulp horror fiction. A "constant presence in Zebra's catalogue", she specialized in the "creepy child" or "child in supernatural peril" trope.

Ruby Mildred Ayres was a British romance novelist, "one of the most popular and prolific romantic novelists of the twentieth century".

Rudaki was a poet, singer and musician who is regarded as the first major poet to write in New Persian. A court poet under the Samanids, he reportedly composed more than 180,000 verses, yet only a small portion of his work has survived, most notably a small part of his versification of the Kalila wa-Dimna, a collection of Indian fables. Classical Persian sources refer to him by his honourary epiphet as Adam of Poets.

Rudolf Herman "Rudi" Fuchs (born 28 April 1942) is a Dutch art historian and curator.