Dervorguilla of Galloway was a "lady of substance" in 13th century Scotland, the wife from 1223 of John de Balliol and mother of John I, a future king of Scotland.

John Balliol or John de Balliol, known derisively as Toom Tabard, was King of Scots from 1292 to 1296. Little is known of his early life. After the death of Margaret, Maid of Norway, Scotland entered an interregnum during which several competitors for the Crown of Scotland put forward claims. Balliol was chosen from among them as the new King of Scotland by a group of selected noblemen headed by King Edward I of England.