Portrait of Mary Tweedie (c. 1704-1784), half-length, in a blue lace-trimmed dress and white bonnet

Mary Tweedie was the daughter of Alexander Stevenson of Dreva and Venlaw. She married Thomas Tweedie of Quarter and Kingledoors on 1 March 1728, and bore him nine children. Her grandson, Thomas Stevenson Tweedie (1784-1855) Laird of Quarter, was Physician General in the East India Company and proprietor of indigo manufacturing concern in Bengal.