Countess Anna of Nassau was a noblewoman from the House of Nassau, born in the late 16th century. She was the daughter of Count John VI of Nassau-Dillenburg and Countess Elisabeth of Leuchtenberg. Anna played a significant role in the political landscape of her time, particularly through her marriage to Count William of Nassau-Siegen, which strengthened alliances between noble families. Throughout her life, Anna was known for her patronage of the arts and her involvement in charitable activities. She had several children, including Count John VII of Nassau-Siegen, who continued the family's legacy. Anna's contributions to her community and her family's prominence made her a notable figure in the history of the Nassau dynasty.