Family: William Cavendish, 1st. Duke of Devonshire / Lady Mary Butler (F4118)
m. 26 Oct 1662William Cavendish, 3rd. Earl of Devonshire (1617-1684) 
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Lady Elizabeth Cecil (1619-1689) |
| William Cavendish, 1st. Duke of Devonshire (1640-1707)
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| Lady Mary Butler (1646-1710) |
William Cavendish, 2nd. Duke of Devonshire KG PC (1673-1729)  |