Odo IV, Duke of Burgundy

Odo IV or Eudes IV (1295 – 3 April 1349) was Duke of Burgundy from 1315 until his death and Count of Burgundy and Artois between 1330 and 1347. He was the second son of Duke Robert II and Agnes of France.

Odo succeeded his elder brother, Hugh V, in 1315. Odo defended the rights of his niece Joan of Navarre against Philip the Tall, another uncle, after Louis X's death in 1316. In 1318, Odo married Philip's eldest daughter, Joan III, Countess of Burgundy (1308 – 1347). Thus allying himself with Philip V, who had become king of France.

On the death of his brother, Louis in 1316, Odo became titular king of Thessalonica. By 1320, Odo was complaining to the pope of the Angevins' usurpation of Thessalonica, yet later sold his rights as King of Thessalonica and Prince of Achaea to Louis, Count of Clermont.

Odo's wife inherited the domains of her mother in 1330: the county of Artois and the county of Burgundy, the so-called Free County. Her claim to the County of Artois was challenged by Robert III of Artois, who at that time was a close friend and advisor of King Philip VI. The dispute ended abruptly when in December 1330 the documents used by Robert of Artois to support his claim were found to be forged on his instructions.

Odo was a loyal vassal of his brother-in-law, Philip of Valois, after he succeeded to the French throne as Philip VI. He belonged to Philip VI’s small circle of trusted advisors. He fought in many theatres of French warfare: the Low Countries, Brittany, Aquitaine. He fought the Flemings and was wounded at the Battle of Cassel in 1328.

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