Adelaide of Nanteuil was a noblewoman from the 10th century, known for her significant role in the political landscape of medieval France. She was the daughter of Hugh the Great, a powerful duke, and married Count Richard I of Normandy, strengthening ties between the regions. Her marriage produced several notable children, including Richard II of Normandy, who continued the family's influence. Adelaide's life reflects the intertwining of noble families during this period, showcasing the importance of alliances in maintaining power and stability in feudal society.