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Female Joan De Rivers Click to view Joan De Rivers in the family tree

Joan De was born about 1202 in Isle Of Wight, Hampshire, England.  Joan De's father was William De Vernon 5th Earl Of Devon and her mother was Mabel (Maud) De Beaumont [Countess Of Dev.  Her paternal grandparents were Baldwin de Reviers , 1st Earl of Devon and Adelise Lucia de Baalun; her maternal grandparents were Robert De Beaumont Count Of Meulan and Maud Fitzroy of Cornwall Dunstanville. She had a brother and two sisters, named Baldwin De, Mary De Reviers De and Margary De.  She was the youngest of the four children.

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