Rosie Roche, a second cousin of Prince William and Prince Harry, has reportedly died. He was 20 years old. Roche - the granddaughter of Princess Diana's uncle, Edmund Roche (her mother Frances Shand Kydd's brother) - reportedly died on July 14, according to multiple outlets. She was found by her mother and sister after she had been packing for a trip with her friends, per The Sun. The outlet also reported that the Wiltshire and Swindon coroner's court opened an investigation into her death. The Sun added that the inquiry was "adjourned until October 25.