Harry Laurence Birkin 
Harry Laurence was born on March 17th, 1872. He died at the age of 78 on January 6th, 1951.General Notes
"Ancestors/Descendants of Royal Lines" (Contributors: M. Thompson, Reynaud de Paysac, H.R. Moser <Burke Peerage>), F.L. Jacquier, O.Guionneau, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842, L. Orlandini, R. Dewkinandan, and E. Lodge>).
‌Harry Laurence and Olive were married in a religious ceremony on April 29th, 1909. They had a son named David Leslie.
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Children
David Leslie Birkin
David Leslie was born on November 12th, 1914. He died at the age of 76 on February 28th, 1991.