William III of Mâcon
William III of Mâcon (1088–1156), also known as William IV of Burgundy, was count of Mâcon (1102–1156), count of Auxonne (1127–1156), count of Vienne (1148–1156) and regent of the county of Burgundy (1148–1156). He was a younger son of Stephen I, Count of Burgundy, and of Beatrice of Lorraine. After the death of his brother, Renaud III, he took control of the county of Burgundy in the name of his niece Beatrice. He was recognized as count by the emperor Frederick Barbarossa by 1152. He died in 1156 while on Crusade in the Holy Land, and Frederick married Beatrice and took over the county.
- Stephen II, who succeeded to Auxonne, Trier and the title Count of Burgundy
- Girard I, who succeeded to Mâcon
- Malaspina, possibly illegitimate
- Constance Brittain Bouchard, Sword, Miter, and Cloister: Nobility and the Church in Burgundy, 980–1198 (Ithaca and London: Cornell University Press, 1987), pp. 277–78.