Reginald II of Burgundy
Reginald II (c. 1056–c. 1097) was Count of Burgundy, Mâcon, Vienne and Oltingen, the eldest son of William I the Great and Étiennette, and elder brother of Pope Callixtus II. He succeeded his father in 1087 alongside his brother Stephen I in Burgundy and Mâcon.
By his marriage to Regina of Oltingen, heiress of Count Conon in the region of Bern, Reginald gained the County of Oltingen; their son was William II, later called the German. Reginald died around 1097 on the First Crusade, and his brother Stephen I succeeded him in Burgundy.