Countess Margaret of Holland was a noblewoman born around 1340, known for her role in the House of Holland. She was the daughter of Count William IV of Holland and Joanna of Bavaria, which connected her to significant European royal lineages. Margaret became the Countess of Holland through her marriage to Count William V of Holland. Margaret's life was marked by her involvement in the political affairs of her time. She played a crucial role in managing the affairs of the county during her husband's absence. Her legacy includes contributions to the stability and governance of Holland in the late 14th century.