Tatiana Schlossberg, the granddaughter of former President John F. Kennedy, passed away at the age of 35 on Tuesday from acute myeloid leukemia.

Schlossberg disclosed her illness in an essay for The New Yorker on Nov. 22, sharing that her doctors gave her less than a year to live. She is survived by her parents, Edwin Schlossberg and Caroline Kennedy, her husband, George Moran, and her two children.

“Our beautiful Tatiana passed away this morning. She will always be in our hearts,” the family said in statement posted by the John F. Kennedy Presidential Library.

Doctors discovered her cancer on May 25, just hours after she had given birth, when blood tests showed her white blood cell count had spiked to 131,000 cells per microliter, more than ten times normal levels. She underwent chemotherapy, two bone marrow transplants and CAR-T cell therapy over the past year.

Schlossberg spent around six months in the hospital and suffered from complications such as a postpartum hemorrhage and kidney damage, according to her essay.

“For my whole life, I have tried to be good, to be a good student and a good sister and a good daughter, and to protect my mother and never make her upset or angry. Now I have added a new tragedy to her life, to our family’s life, and there’s nothing I can do to stop it,” Schlossberg wrote.

Schlossberg’s family has been through a number of personal tragedies, including the assassinations of her grandfather and great uncle, Robert F. Kennedy, and the death of her uncle, John F. Kennedy Jr., in 1999.

Schlossberg’s brother, Jack Schlossberg, announced his candidacy to replace retiring Democratic Rep. Jerry Nadler of New York in November.

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