Otto-William, Count of Burgundy

Otto-William (French: Otte-Guillaume; German: Otto Wilhelm; c. 958 – 21 September 1026 AD) was count of Mâcon, Nevers, and Burgundy.

[1] After Adalbert's death in 971/5, Gerberga married for a second time, to Henry I, Duke of Burgundy, the younger brother of King Hugh Capet.

[4] In c. 982, he married Ermentrude of Roucy, whose maternal grandmother, Gerberga of Saxony, was a sister of Otto I, Holy Roman Emperor, and by this marriage alliance created a web of consanguinity between later kings of France, Germany, Burgundy and the Carolingians.

[4] This marriage brought to Otto-William the County of Mâcon as well as[5] many other rights on the left bank of the Saône in the province of Besançon.

Some scholars have identified her as the four-times widowed Adelaide-Blanche of Anjou,[12] but the identity is not directly attested[13] and has been disputed by some studying the question.