Jack Schlossberg shared a deep bond with his sister Tatiana Schlossberg until his death on December 30th.
Tatiana passed away on Tuesday at the age of 35 after a battle with acute myeloid leukemia.
The JFK Library Foundation added on Instagram: “Our beautiful Tatiana passed away this morning. She will always be in our hearts.”
The message was signed: “George, Edwin and Josephine Moran…Ed, Caroline, Jack, Rose and Rory.”
Tatiana shared her devastating diagnosis in a moving essay published in The New Yorker in November. At the time, she revealed that she was diagnosed with a terminal condition in May 2024 and that doctors had given her only one year to live.
The diagnosis came after the birth of her second child with husband George Moran.
Jack, who is running for Congress, immediately supported her with a powerful Instagram story. The son of Caroline Kennedy and Edwin Schlossberg shared a photo of a gravel road and an image of a bright blue sky.
Last month, he wrote above the photo: “Life is short, let’s make the best of it.” He also shared an excerpt from his sister’s emotional essay “A Battle With My Blood.”
In her essay, the late author acknowledged not only her husband but also her sister Rose and younger brother. “George did everything he could for me,” she wrote of her spouse. “He talked to all the doctors and insurance people I didn’t want to talk to and slept on the hospital floor.”
“My parents and brother and sister have also been raising my children in my various hospital rooms almost every day for the past year and a half,” she continued.
“While I was suffering, they held my hand without flinching and tried not to show their pain or sadness to protect me. This was a great gift, even though I feel their pain every day.”
In a heartbreaking essay, Tatiana said that throughout her life she had “tried to be a good student, a good sister, a good daughter.”
The brothers, who grew up alongside their older sister Rose as the only three grandchildren of the late John F. Kennedy and Jacqueline Kennedy Onassis, had a lot in common.
They both attended Yale University, where Jack studied history with a focus on Japan, and Tatiana was editor-in-chief of the Yale Herald.
Tatiana also shares her brother’s interest in history, and she will pursue a master’s degree in American history at Oxford University in England.
It’s a passion they both shared with their late grandparents, and one she once shared with Vanity Fair.
“My understanding is that both of my grandparents, I didn’t know much about them, loved history and reading books about history,” she said in 2019.
“And that’s how I’ve connected with them, not just by studying them and their times, but by studying the eras and patterns they were fascinated by and imagining areas of disagreement. It’s an important way for me personally to connect with my family’s heritage.”
Although Tatiana has passed away, Jack continues to nurture that family legacy with the two children he shared with Moran.
“I’ve got a new nephew,” Jack said during an appearance on the Today show in 2022. “It’s a boy. His name is Edwin, but I’d like to call him Jack.”
