Eglantine Wallace, Lady Wallace (died 1803), was an English author.
Eglantine was the youngest daughter of Sir William Maxwell, 3rd Baronet, of Monreith, Wigtownshire, and sister of Jane Gordon, Duchess of Gordon. A boisterous in her youth, and a woman of violent temper in her maturer years, she was married on 4 September 1770 to Thomas Dunlop, son of John Dunlop of Dunlop, and Frances Anna, daughter and heiress of Sir Thomas Wallace (1702–1770) of Craigie, fifth and last baronet. On his grandfather's death Dunlop, inheriting Craigie, took the name of Wallace and assumed the style of a baronet; but the property was deeply indebted, and in 1783 he was obliged to sell all that remained of Craigie. It would seem to have been shortly after this that his wife obtained a legal separation, on the ground, it is said, of her husband's cruelty. It is probable that the quarrel was due to pecuniary embarrassment.
A little later Lady Wallace was herself summoned for assaulting a woman—apparently a humble companion—and was directed by the magistrate to compound the matter. Leaving Edinburgh, she seems to have settled in London, but upon her play "The Whim" being prohibited the stage by the licenser, she left England in disgust. In October 1789 she was arrested at Paris as an English agent, and narrowly escaped with her life. In 1792 she was in Brussels. There she contracted a friendship with General Charles François Dumouriez, whom in 1793 she entertained in London, where she seems to have been well received in society. She died at Munich on 28 March 1803, leaving two sons, the elder of whom was General [Sir] John Alexander Dunlop Agnew Wallace.
She was author of: