Sonia Cubitt, Baroness Ashcombe, née Keppel, was the daughter of Alice Keppel, a long-time lover of Britain's King Edward VII from his days as Prince of Wales, and her husband George Keppel. Violet Trefusis was her older sister. In 1920, Sonia married Hon. Roland Cubitt, who later succeeded his father as Baron Ashcombe; they divorced in 1947 after having had three children. She was the grandmother of Camilla, Duchess of Cornwall.