Ermentrude de Roucy (Irmtrude) was a Countess and Duchess of Burgundy. She was a daughter of Renaud of Roucy and his wife, Alberade of Lorraine, daughter of Gilbert, Duke of Lorraine. Ermentrude married Aubry II of Mâcon and thus became a countess of Mâcon. She also married Otto-William, Count of Burgundy. They had children: * Guy I of Mâcon * Matilda, married Landri of Nevers * Gerberga, married William II of Provence * Reginald I, Count of Burgundy * Agnes of Burgundy, Duchess of Aquitaine