Harriet Catherine Grenville 
Harriet Catherine was born on January 1st, 1800. She died at the age of 66 on April 17th, 1866 in Bridgewater House, London, England.General Notes
SOURCES: "Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, F.L. Jacquier <Justin Swanstrom>, H.R. Moser <Burke Peerage>, L. Orlandini, O.Guionneau, L.B. de Rouge, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842>, L. Gustavsson, C. Cheneaux, E. Lodge, and S. Bontron <Brian Tompsett>) http://geneastar.org.
‌Harriet Catherine and Francis were married in a religious ceremony on June 18th, 1822 in St. George's, Hannover Square, England. They had a son named George Granville.
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Children
George Granville Egerton
George Granville was born on June 15th, 1823 in London, England. He died at the age of 39 on September 19th, 1862.