Ermengarde of Anjou was a noblewoman from the 12th century, known for her role in the political landscape of medieval France. She was the daughter of Fulk V of Anjou and Ermengarde of Maine, and she became the wife of Geoffrey Plantagenet, the Count of Anjou. Their marriage helped to strengthen alliances between powerful families. Ermengarde and Geoffrey had several children, including Henry II of England, who would later become a significant monarch. Through her lineage, Ermengarde played a crucial role in the establishment of the Plantagenet dynasty, which would shape English history for centuries.