Kennedy curse
The Kennedy curse is invoked to describe a series of misfortunes (known as the Kennedy family tragedies) involving members of the powerful and celebrated Kennedy family of the United States of America. Skeptics have argued that many of the events are normal, and it is not improbable that a large extended family would experience them.
Chronology
Believers in the curse generally cite the following events as evidence of the family's misfortunes:
November, 1941—Rosemary Kennedy was often believed to have been intellectually disabled, and due to her severe mood swings and the worry that she would damage the Kennedy reputation, her father, Joe, Sr., arranged in secret for her to undergo a lobotomy. The lobotomy instead left her unable to walk or speak well, and as a result, Rosemary remained institutionalized until her death in 2005.
August 12, 1944—Joseph P. Kennedy, Jr. died when his plane exploded over East Suffolk, England, as part of Project Anvil.
May 13, 1948—Kathleen Cavendish, Marchioness of Hartington died in a plane crash in France.