Lauderdale's first marriage was to Lady Anne Home, daughter of Alexander Home, 1st Earl of Home, by whom he had one daughter. Prior to her death it is strongly suspected that Elizabeth Maitland, Duchess of Lauderdale, daughter of William Murray, 1st Earl of Dysart and now widow of Sir Lionel Tollemache, became his mistress, and they subsequently married in 1672 upon Lady Anne's death. He left no male heir, consequently his dukedom and his English titles became extinct, but he was succeeded in the earldom by his brother Charles Maitland, 3rd Earl of Lauderdale.
Note N30John Maitland, 2nd Earl of Lauderdale, was one of the most important and controversial Scottish figures of the late 17th century. As a leading royalist, he was a confidant of King Charles II and spent nine years in the Tower of London under sentence of death. After the Restoration, he was appointed Secretary of State for Scotland. As such, he was virtually the uncrowned King of Scotland, and wielded unrivalled power and influence.
On his second marriage to the Countess of Dysart, he was created Duke of Lauderdale and began transforming Thirlestane Castle into a fitting palace from which to direct the affairs of Scotland. He employed Sir William Bruce to undertake the remodelling of the Castle. Bringing Renaissance influences to the Scottish Baronial style, he introduced the two front towers and the grand staircase and oversaw the transformation of the interior, the most remarkable feature of which is the rich plasterwork of the State Rooms
The Duke's unscrupulous use of power eventually caused his downfall. Forced by the King to resign, he lost all his offices and was even deprived of his pension. On his death in 1682, leaving no heir, the Dukedom conferred upon him became extinct, while Thirlestane passed to his brother, Charles, 3rd Earl of Lauderdale.
Record ID Number: MH:N324
Marshall, Rosalind K. (2004). "Murray , Elizabeth, duchess of Lauderdale and suo jure countess of Dysart (bap. 1626, d. 1698)". Oxford Dictionary of National Biography. Oxford University Press