In 1967 his daughter Svetlana Alliluyeva made big news when she defected to the U.S.
[DOC] [TLE] Svetlana Alliluyeva - Wikipedia [PAR] Svetlana Iosifovna Alliluyeva later known as Lana Peters was the youngest child 
and only daughter of Soviet Premier Joseph Stalin and Nadezhda Alliluyeva, 
Stalin's second wife.