Otto-William of Burgundy

Otto-William (c. 958–1026), son of King Adalbert of Italy and Gerberga of Chalon, was adopted by his stepfather Henry I, Duke of Burgundy, as a possible heir to the duchy. Around 982 he married Ermentrude of Roucy, gaining the County of Mâcon, and around Dole he built up the lands that became the Free County of Burgundy.

King Robert II of France annexed the duchy in 1005. In 1016 Otto-William revolted against Emperor Henry II. He died on 21 September 1026 and was buried at Saint-Bénigne in Dijon, succeeded by his son Reginald I.