Countess Ermesinde was a notable historical figure from the 12th century, known for her role as the Countess of Luxembourg. Born around 1186, she was the daughter of Count Henry IV of Luxembourg and Countess Sophie of Namur. Ermesinde played a significant part in the political landscape of her time, particularly through her marriages and alliances. She became the Countess of Namur after her marriage to Count Baldwin IV of Namur. Following his death, Ermesinde took on a powerful role, effectively ruling and managing her territories. Her leadership and influence helped shape the region's history during a time of feudal conflicts and territorial disputes.