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Kathleen Agnes Cavendish, Marchioness of Hartington (née Kennedy; February 20, 1920 – May 13, 1948), also known as "Kick" Kennedy,[1][2] was an American socialite. She was the second daughter of Joseph P. Kennedy Sr. and Rose Fitzgerald, a sister of U.S. President John F. Kennedy and Senators Robert F. Kennedy and Ted Kennedy, and the wife of the Marquess of Hartington, heir apparent to the 10th Duke of Devonshire.
When her father was serving as U.S. Ambassador to the United Kingdom, Kathleen made many friends in London and was the "debutante of 1938".[3] Working with the Red Cross, she began a romantic relationship with Lord Hartington, whom she married in May 1944. He was killed on active service in Belgium only four months later. Kathleen died in a plane crash in 1948, flying to the south of France while on vacation with her new partner, the 8th Earl Fitzwilliam.
Kennedy in 1944, when she was a member of the American Red Cross stationed in England
Personal details
Born Kathleen Agnes Kennedy
February 20, 1920
Brookline, Massachusetts, U.S.
Died May 13, 1948 (aged 28)
Saint-Bauzile, Ardèche, France
Cause of death Airplane crash
Resting place St Peter's Church, Edensor, Derbyshire, England
Spouse William Cavendish, Marquess of Hartington
(m. 1944; died 1944)
Parent(s) Joseph P. Kennedy Sr.
Rose Fitzgerald
Relatives Kennedy family (by birth)
Cavendish family (by marriage)
Education Riverdale Country School
Noroton Convent of the Sacred Heart
Holy Child Convent
Alma mater Queen's College, London
Finch School
Florida Commercial College