Odo I, Count of Orléans

Odo I (French: Eudes; also Hodo, Uodo, or Udo in contemporary Latin; died 25 May 834) was the Count of Orléans (comes Aurelianensium) following the final deposition of Matfrid until his own deposition a few years later.

He belonged to the Udalriching family and was a son of Adrian,^[1] who had also held the county of Orléans, and possibly of Waldrada, a Nibelungid. In 811, as count (comes), according to the Annales Fuldenses, he signed a peace treaty with the Vikings.

According to the Vita Hludowici, in 827, he was named to replace the deposed Matfrid in Orléans. Odo, along with Heribert, a relative, possibly his cousin, were exiled in April 830 by Lothair I and Orléans was confiscated. Matfrid was reinstated.

In 834, while fighting Matfrid and Lambert I of Nantes, partisans of Lothair, Odo was killed as were his brothers William, Guy of Maine, and Theodo, abbot of Saint Martin of Tours.^[a]

Odo's wife was Engeltrude de Fézensac.^[3] Their eldest daughter, Ermentrude, married Charles the Bald of West Francia.^[4] He left a son William who was executed by his own brother-in-law in 866.

• Jackman, Donald C. (2015). Three Bernards Sent South to Govern II: Counties of the Guilhemid Consanguinity. Editions Enlaplage.
• Le Jan, Régine (2003). Famille et pouvoir dans le monde franc (VIIe-Xe siècle) (in French). Publications de la Sorbonne.
• McKitterick, Rosamond (2018). The Frankish Kingdoms Under the Carolingians 751-987. Routledge.
• Nithard (2022). Conti, Maro (ed.). Histories. Translated by Conti, Marco. Peeters.