Rosie Roche was discovered at her family home by her mother and sister and police are treating her death as not suspicious.

Rosie Jeanne Burke Roche, born on June 21, 2005, was Prince William and Prince Harry's cousin. She was the granddaughter of Princess Diana's uncle Edmund Roche, 5th Baron Fermoy, who died in 1984 of a self-inflicted gunshot wound, per The New York Times.

Prince William and Prince Harry’s 20-year-old cousin died of “traumatic head injury,” according to a coroner’s report. Rosie Roche, a second cousin to the heir to the British throne, was found dead on July 14 at her home in Norton,