Tatiana Schlossberg - the daughter of Caroline Kennedy and granddaughter of late U.S. President John F. Kennedy - died on Tuesday, December 30, following a terminal cancer diagnosis. She was 35. "Our beautiful Tatiana passed away this morning. She will always be in our hearts," the JFK Library Foundation shared in a statement via Instagram signed by Tatiana's husband, George Moran, their two children, Edwin, 3, and Josephine, 19 months, her parents, Edwin Schlossberg and Caroline Kennedy, her siblings, Jack and Rose Schlossberg, and her sister-in-law, Rory Schlossberg.