Ehrengard Melusine von der Schulenburg, Duchess of Kendal and Duchess of Munster (25 December 1667–10 May 1743) was born at Emden. Her middle name was probably given in reference to the Melusine legends. Her brother was Marshal Johann Matthias von der Schulenburg.
Melusine moved with him to England, and on 18 July 1716 was created for life Duchess of Munster, Marchioness and Countess of Dungannon, and Baroness Dundalk, in the Peerage of Ireland. On 19 March 1719 she was further created Duchess of Kendal, Countess of Feversham and Baroness Glastonbury, in the Peerage of Great Britain.
In 1723, Charles VI, Holy Roman Emperor created her Princess of Eberstein. This last creation in particular tended to support the theory that she had married the King in secret. Robert Walpole said of her that she was "as much the queen of England as anyone was" (George's wife Sophia had been kept in imprisonment since their divorce in 1694).
She died, unmarried (unless George I had wedded her), in 1743.