Dervorguilla of Galloway

Dervorguilla of Galloway (c. 1210–1290) was a Scottish heiress, daughter of Alan, Lord of Galloway and Margaret of Huntingdon, descended through her mother from King David I. She married John de Balliol in 1223 and became one of her father's heirs on his death in 1234; her royal descent underpinned her son John Balliol's claim to Scotland's throne.

After her husband's death in 1269 she kept his embalmed heart in an ivory casket, and in 1273 founded the Cistercian Sweetheart Abbey near Dumfries. In 1282 she endowed and gave statutes to Balliol College, Oxford. She died on 28 January 1290 and was buried at the abbey.