Odo I of Blois

Odo I (c. 950–996) succeeded his father Theobald the Trickster around 977 as count of Blois and Chartres, and was made count palatine by King Lothair. In the 970s he subjugated Rennes in Brittany, and in 987 supported Charles of Lorraine against Hugh Capet.

In June 991 he seized Melun, soon retaken by a royal coalition, and later warred on Fulk Nerra of Anjou. While besieging Langeais in the winter of 995–996 he fell ill and died at Marmoutier Abbey near Tours on 12 March 996. By Bertha of Burgundy he left his successors Theobald II and Odo II.