Sir John Stewart of Darnley, 1st Comte d'Évreux, 1st Seigneur de Concressault, 1st Seigneur d'Aubigny (c. 1380 – 1429) was a Scottish nobleman and famous military commander who served as Constable of the Scottish Army in France, supporting the French against the English during the Hundred Years War.

He was a fourth cousin[1] of King James I of Scotland (reigned 1406 to 1437), the third monarch of the House of Stewart.

Charles ordered Darnley to cross the Loire and retake Auxerrois [fr] and Nevernois, and he besieged Cravant, but was defeated, captured and lost an eye.

Four days later, he commanded the Scottish contingent at the Battle of the Herrings, where he was killed, and his brother William, who tried to rescue him.

[5] She remained in Scotland, but at some time followed Darnley to France, where she died 10 months after him and is buried beside him at Orléans.