Louisa O'Callaghan 
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.
‌Louisa and William were married in a religious ceremony on July 18th, 1807. They had two sons named William and George Henry.
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Children
William Cavendish
William was born on April 27th, 1808. He died at the age of 83 on December 21st, 1891 in Holker Hall, England.
George Henry Cavendish
George Henry was born on August 19th, 1810. He died at the age of 70 on September 23rd, 1880.