William Cavendish 4th Duke Of Devonshire (1720 - )	=	Charlotte Elizabeth Clifford ( - 24 DEC 1754)		John Spencer 1st Earl Spencer (19 DEC 1734 - 31 OCT 1783)	=	Margaret Georgiana Poyntz ( - 18 MAR 1814)
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William Cavendish 5th Duke Of Devonshire (14 DEC 1748 - 29 JUL 1811)	=	Georgiana Spencer (7 JUN 1757 - 30 MAR 1806)
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William Spencer Cavendish 6th Duke Of Devonshire
Birth Date	21 MAY 1790
Death Date	17 JAN 1858

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