Odo of Champagne

Odo of Champagne (c. 1040–1115), also Eudes II of Troyes, was the son of Count Stephen II of Troyes and Meaux and ruled Troyes and Meaux from 1047. His uncle Theobald III of Blois governed as regent during his minority.

In 1060 he married Adelaide of Normandy, sister of William the Conqueror and heiress of Aumale, and became count of Aumale through her. He accompanied William in the conquest of England in 1066, while Theobald seized his Champagne counties.

In 1095 he was imprisoned and lost his English lands for joining a plot to put his son Stephen on the English throne. He died in 1115.