Count Gerhard II of Holstein was a nobleman who ruled during the late 12th century. He was part of the House of Schauenburg, a prominent family in northern Germany. His reign was marked by efforts to strengthen the power and influence of the County of Holstein. Gerhard II is known for his involvement in regional politics and alliances, which helped shape the landscape of northern Europe. He played a significant role in the conflicts and power struggles of the time, contributing to the development of the Duchy of Schleswig and the surrounding areas.