The "Countess of Holland" refers to the female ruler or noblewoman who held the title of Countess in the historical region of Holland. This title was often associated with the governance of the area during the medieval period, particularly when Holland was an important part of the County of Holland. Countesses played significant roles in the political and social landscape of their time, often influencing alliances and marriages among the nobility. Notable Countesses include Countess Ada of Holland and Countess Margaret of Holland, who contributed to the region's history through their leadership and familial connections.