( Rossum's Universal Robots ) ( 1921 ) – the play that introduced the word robot to the world – were organic artificial humans, the word " robot " has come to primarily refer to mechanical humans, animals, and other beings.

* 1921 – Robert Cliche, Canadian politician and magistrate ( d. 1978 )

* 1921 – Black Friday: mine owners announce more wage and price cuts, leading to the threat of a strike all across England.

* 1921 – Tove Maës, Danish actress ( d. 2011 )

* 1921 – The British install the son of Sharif Hussein bin Ali ( leader of the Arab Revolt of 1916 against the Ottoman Empire ) as King Faisal I of Iraq.

* 1921 – Georg Alexander, Duke of Mecklenburg ( d. 1996 )

* 1921 – Ernest Angley, American evangelist and broadcaster

* 1921 – J. James Exon, American politician ( d. 2005 )

They won the first eight matches in succession including a 5 – 0 whitewash in 1920 – 1921 at the hands of Warwick Armstrong's team.

* 2008 – Jake Warren, Canadian diplomat ( b. 1921 )

* 2012 – N. K. P. Salve, Indian politician ( b. 1921 )

The most important Canadian theorist was an American immigrant, Henry Wise Wood, president of the United Farmers of Alberta ( UFA ) during that movement's time as the governing party of the province ( 1921 – 1935 ).

* 1921 – Jack Kramer, American tennis player ( d. 2009 )

* 1921 – Major League Baseball Commissioner Kenesaw Mountain Landis confirms the ban of the eight Chicago Black Sox, the day after they were acquitted by a Chicago court.

* 1921 – Marilyn Maxwell, American actress ( d. 1972 )

* 1921 – Richard Adler, American songwriter and composer ( d. 2012 )

* 1921 – Hayden Carruth, American poet and critic ( d. 2008 )

* 1999 – Byron Farwell, American historian ( b. 1921 )

The second generation was led by Fernand Braudel ( 1902 – 1985 ) and included Georges Duby ( 1919 – 1996 ), Pierre Goubert ( 1915 – 2012 ), Robert Mandrou ( 1921 – 1984 ), Pierre Chaunu ( 1923 – 2009 ), Jacques Le Goff ( 1924 – ) and Ernest Labrousse ( 1895 – 1988 ).

** Leo Penn, American actor and director ( b. 1921 )

* Melitz, Leo, The Opera Goer's Complete Guide, 1921 version, source of the plot.

The first phase was in 1921 by noted Tampa architect M. Leo Elliott ( Centro Asturiano de Tampa and Old Tampa City Hall ) who designed the initial houses and the public buildings.

* Leo Penn ( 1921 – 1998 ), actor and director

* David Gorcey ( 1921 – 1984 ), brother of Leo and regular member of the Dead End Kids / East Side Kids / The Bowery Boys.

* Leo Strauss: The Early Writings ( 1921 – 1932 ).

* Leo Lánczy ( Pest, 1852 – Budapest, 1921 ) deputy

* Leo Bogart ( 1921 – 2005 ), American sociologist and media and marketing expert

In 1921 he flew from Auckland to Wellington in 5 hours and 16 minutes with stops at Kawhia and Wanganui with Leo Walsh as passenger.

** Leo Penn ( 1921 – 1998 ), actor

* John Leo Sullivan, Secretary of State for the U. S. state of Missouri, 1917 – 1921

He and his wife Anna, whom he married in 1920, had three children: Feliza ( 1920 ), Leo ( 1921 ), and Hilda ( 1929 ).

Later Sapir and Leo Frachtenberg added the Kalapuyan and the Chinookan languages and then later the Alsean and Tsimshianic families, culminating in Sapir's 1921 four-branch classification:

Her elder daughter Margot Elinor, Lady Davson OBE died 10 September 1966 in Rome ; she married Sir Edward Davson, 1st Baronet ( 14 September 1875 – 9 August 1937 ) in 1921 and had two sons: Geoffrey Leo Simon Davson, who inherited his father's baronetcy ( created 1927 ) but changed his name to Anthony Glyn ( 13 March 1922 – 20 January 1998 ), and Christopher Davson.

A year later, in 1921, Saint Leo became accredited by the Southern Educational Association.

Leo Z. Penn ( August 27, 1921 — September 5, 1998 ) was an American actor and director, and father of musician Michael Penn and actors Sean Penn and the late Chris Penn.

They were named for Brother Leo Brouiletter ( Provincial of the Marist Brothers, 1921 – 1930 ) and Saint Marcellin Champagnat respectively.

Leo Navratil ( July 3, 1921, Türnitz, Lower Austria September 18, 2006, Vienna ) was an Austrian psychiatrist and author.

* Corporal Leo Major ( 1921 – 2008 ), Corporal in the Canadian Army

Leo Moser ( April 11, 1921, Vienna — February 9, 1970, Edmonton ) was an Austrian-Canadian mathematician, best known for his polygon notation.

Noted Tampa architect M. Leo Elliott was the architect for both buildings which were part of the original Temple Terrace Estates, one of the first Mediterranean Revival golf course planned communities in the United States ( 1921 ).

William J. Burns ( October 19, 1861 – April 14, 1932 ), known as " America's Sherlock Holmes ," is famous for having conducted a private investigation clearing Leo Frank of the murder of Mary Phagan, and for serving as the director of the Bureau of Investigation ( BOI ) ( predecessor to the FBI ) from August 22, 1921 to May 10, 1924.

* George William Fullerton ( 1921 – 2009 ), American guitar innovator, ( associate of Leo Fender )

Born in Kolozsvár ( then Austria-Hungary, now Romania: Cluj-Napoca ), he was the son of Esther ( b. 1891 ) and Leo Gold ( b. 1890 ), and had a brother, William Gold ( born 1921 ).