The Marquess of Ailesbury cut his son and granddaughter out of his will before falling to his death from his bedroom window.
Michael Brudenell-Bruce, a distant relative of Prince Harry's model ex Florence Brudenell-Bruce, was ruled to have taken his own life last year aged 98.
And probate documents have revealed that the aristocrat removed his heir and several members of his family from his estate just a year before his death.
He had been estranged from David, 72, for decades and received nothing in the will.
Even a reunion three months before the tragic fall at the request of his ten-year-old granddaughter Lady Sophie could not reconcile the pair, The Times reports.
