She was born Henrietta Churchill, and became The Hon. Henrietta Churchill when her father was made a Scottish Lord of Parliament in 1682 and Lady Henrietta Churchill in 1689, when her father was created Earl of Marlborough. She married The Hon. Francis Godolphin in 1698, becoming Lady Henrietta Godolphin. She became Viscountess Rialton in 1706 when her father-in-law was created Earl of Godolphin, and Countess of Godolphin in 1712 when her husband succeeded as 2nd Earl of Godolphin.
An act of parliament in 1706 allowed the 1st duke's daughters to inherit his titles. Following his death in 1722, Lady Godolphin became suo jureDuchess of Marlborough.
She bore five children during her marriage to Lord Godolphin:
Lady Mary Godolphin (1723–1764), married the 4th Duke of Leeds and had issue. (It is strongly suspected that Lady Mary Godolphin was not the daughter of the 2nd Earl of Godolphin, but rather of the Duchess of Marlborough's lover, the playwright......
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