About Svetlana Alliluyeva
Svetlana Iosifovna Alliluyeva (née Stalina; 28 February 1926 – 22 November 2011), later known as Lana Peters, was the youngest child and only daughter of the Soviet leader Joseph Stalin and his second wife, Nadezhda Alliluyeva. In 1967, she became an international sensation when she defected to the United States and, in 1978, became a naturalized American citizen. From 1984 to 1986, she briefly returned to the Soviet Union and had her Soviet citizenship reinstated. She was Stalin's last surviving child. == Early life == Svetlana Stalina was born on 28 February 1926. As her mother was interested in pursuing a professional career, Alexandra Bychokova was hired as a nanny to look after Alliluyeva and her older brother Vasily (born 1921). Alliluyeva and Bychokova became quite close, and remained friends for 30 years, until Bychokova died in 1956. On 9 November 1932, Alliluyeva's mother shot herself. To conceal the suicide, the children were told that she had died of peritonitis, a complication from appendicitis. It would be 10 years before they learnt the truth of their mother's death.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.