Thomas Kingston, 45, was a financier and the husband of the Kents' daughter, Lady Gabriella, 42.
Lady Gloucestershire Coroner's Court heard he died on February 25 at his parents' home in the Cotswolds.
Mr Kingston married Gabriella at St George's Chapel, Windsor Castle, in 2019 with Queen Elizabeth II and the Duke of Edinburgh among the guests.
The couple were last pictured in public together on Valentine's Day at an event to celebrate the works of William Shakespeare.
They were also pictured at the Windsor committal service for the late Queen in September 2022.
Katy Skerrett, senior coroner for Gloucestershire, outlined the circumstances of Mr Kingston's death during a short hearing.
She said: "I can confirm I have received evidence of identification of the deceased in written format, which complies with Rule 23 of the Coroner's Rules 2013.
"That evidence is sufficient for identification and I can thereby confirm the deceased is indeed Thomas Henry Robin Kingston, 45, whose home address is in London.
"I have received evidence of the brief circumstances surrounding this tragic incident also in written format, which complies with Rule 23 of the Coroner's Rules 2013.
"These brief circumstances are as follows. Mr Kingston was visiting his parents' home in the Cotswolds.
"On February 25 2024 he ate lunch with his parents. His father went out to walk the dogs.
"On his return Mr Kingston was not in the house and after approximately 30 minutes his mother went to look for him.
"His father forced entry on a locked outbuilding when no reply could be gained.
"He found Mr Kingston deceased with a catastrophic head injury. A gun was present at the scene.
Exceptional
"Emergency services were called Police are satisfied the death is not suspicious.
Esta historia es de la edición March 02, 2024 de Daily Express.
Comience su prueba gratuita de Magzter GOLD de 7 días para acceder a miles de historias premium seleccionadas y a más de 9,000 revistas y periódicos.
Ya eres suscriptor ? Conectar
Esta historia es de la edición March 02, 2024 de Daily Express.
Comience su prueba gratuita de Magzter GOLD de 7 días para acceder a miles de historias premium seleccionadas y a más de 9,000 revistas y periódicos.
Ya eres suscriptor? Conectar
Bold Timber still Gunning four a season of glory
JURRIEN TIMBER is still eyeing a clean sweep of trophies, despite the odds stacking up against Arsenal.
'YOUNG IS MAKING ME FEEL OLD'
Dyche braced to face Ashley's son
Willock packs punch in absence of Bruno
MAGPIES CAN THRIVE WITHOUT GUIMARAES
POTTER IS SET FOR HAMMERS HOT SEAT
GRAHAM POTTER will be unveiled as West Ham's new manager this morning after Julen Lopetegui was sacked following just 22 games in charge. Potter, who has been out of work since being dismissed by Chelsea in April 2023, has agreed a two-and-a-half year contract with the Hammers.
Davies urging Posh kids to relax
FORMER Peterborough academy graduate Simon Davies has told Darren Ferguson's youngsters to play without fear at Everton in the FA Cup tonight.
Fans make a mockery of Mikel's ball issues
MIKEL ARTETA has been mocked by Carabao Cup organisers after his bizarre ball moan.
BERGVALL'S SMASH & GRAB
Swede's late strike gives Spurs a slight edge in tie
RFU deal delays surgery decision for Feyi-Waboso
ROB BAXTER revealed decision-making over Immanuel Feyi-Waboso's recovery from a shoulder injury has been complicated by a new RFU player deal.
ICE BERG SINKS SLOT
Reds boss furious after Lucas is let off the hook
United banking on a Mainoo compromise
United are confident they can reach an agreement with Kobbie Mainoo over a new long-term deal.