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Kathleen Agnes Kennedy was born 20 February 1920 in Brookline, Massachusetts, United States to Joseph Patrick Kennedy Sr. (1888-1969) and Rose Elizabeth Fitzgerald (1890-1995) and died 13 May 1948 Saint-Bauzile, Ardèche, France of Aeroplane crash. She married William John Robert Cavendish, Marquess of Hartington (1917-1944) 6 May 1944 in Chelsea, London, England, United Kingdom.


Kathleen Cavendish, Marchioness of Hartington (née Kennedy) was the younger sister of assassinated US President John F Kennedy (1917-1963).





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