Watch: Thomas Kingston's Cause of Death RevealedThomas Kingston's relative is detailing the royal family's grief. More than one year after the financier died by suicide in February 2024, Sophie Winkleman, who is married to his wife Lady Gabriella Kingston's brother Lord Frederick Windsor, shared insight into how the royal family members have been doing. "That was a big tragedy in our lives and we all miss him every day," Sophie-who shares daughters Maud, 12, and Isabella, 9, with Frederick, told The Times in an interview posted on Nov. 12. "My girls adored him. It's brutal.