Odo of Deuil

Odo of Deuil (1110 – 18 April 1162), his first name also spelled Odon, Eude or Eudes, was a French historian of and participant in the Second Crusade (1147–1149).

Born at Deuil to a modest family, he became a monk and was a confidant of Suger, abbot of Saint-Denis. He took part in the Second Crusade in 1147, and served as the chaplain of Louis VII on the expedition.

His narrative of the Crusade is entitled De profectione Ludovici VII in Orientem (On Louis VII's journey to the East), which relates the progress of the crusade from France to Antioch. However, Professor Jonathan Phillips has recently argued that Eudes' view of Byzantium was possibly rooted in ideological differences which minor skirmishes between the crusaders and Greeks had brought to the fore. His prejudice should also be set against the experience of Conrad III of Germany, who wrote that Manuel treated him as a "brother."

Eudes' account ends with the remnant of the crusade arriving at Antioch, and so does not include a description of the Siege of Damascus in 1148.

He returned to France and became abbot of Saint-Denis in 1151.