Leon Lvovich Sedov was the son of the Russian Communist leader Leon Trotsky and his second wife Natalia Sedova. Leon Sedov was born when his father was in prison facing life sentence for having led the first Soviet in the Revolution of 1905. He lived separately from his parents after the October Revolution in order not to be seen as privileged. He later supported his father in the struggle against Josef Stalin and became a leader of the Trotskyist movement in his own right. Wikipedia
The definitive Wikipedia entry for Leon Sedov. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Leon_Sedov
Leon Lvovich Sedov died on 16th February at eleven oclock in the morning in a Paris hospital, as a result of two operations made necessary by a sudden attack of appendicitis. www.marxists.org/archive/serge/1938/02/sedov.htm