Cornwallis-West and Lady Randolph Churchill were married on 28 July 1900.
The wedding was held at St Paul's Church, Knightsbridge.
 They separated in 1912 and divorced on 1 April 1914, but continued to meet socially upon occasion.
After their divorce, she returned to her former name : Lady Randolph Churchill.
On 6 April 1914, Cornwallis-West married Stella Campbell.

Cornwallis-West's sister, née Mary Theresa Cornwallis-West, was a noted society beauty.
Known as Daisy, Princess of Pless, she was the first wife of Hans Heinrich XV, Prince of Pless.
Another Cornwallis-West sister, Constance, became the first wife of Hugh Grosvenor, 2nd Duke of Westminster.

In 1951, aged 76, after having been afflicted for many years with Parkinson's disease, Cornwallis-West committed suicide, leaving no legitimate children.
Cornwallis-West and Lady Randolph Churchill were married on 28 July 1900. The wedding was held at St Paul's Church, Knightsbridge.  They separated in 1912 and divorced on 1 April 1914, but continued to meet socially upon occasion. After their divorce, she returned to her former name : Lady Randolph Churchill. On 6 April 1914, Cornwallis-West married Stella Campbell.
Cornwallis-West's sister, née Mary Theresa Cornwallis-West, was a noted society beauty. Known as Daisy, Princess of Pless, she was the first wife of Hans Heinrich XV, Prince of Pless. Another Cornwallis-West sister, Constance, became the first wife of Hugh Grosvenor, 2nd Duke of Westminster.
In 1951, aged 76, after having been afflicted for many years with Parkinson's disease, Cornwallis-West committed suicide, leaving no legitimate children.
George Cornwallis-West