Countess Margaret of Hainaut was a noblewoman born in the late 13th century, known for her influential role in the politics of medieval Europe. She was the daughter of Count John I of Hainaut and Countess Philippa of Luxembourg, which connected her to powerful dynasties. Margaret married Count William II of Holland, strengthening ties between their regions. Her marriage produced several children, including Countess Margaret of Holland, who continued the family's legacy. Margaret's life exemplified the strategic alliances formed through marriage during this period, highlighting the importance of noblewomen in shaping political landscapes.