For 10 points, give this name of many kings of Denmark.
One ruler of this name was repulsed at Brunkeberg by forces under Sten Sture the Elder, ending his hegemony over a neighboring nation that he had obtained after the ousting of Charles Knutsson. Another ruler of this name spent many years working with his minister Jacob Estrup but later saw the ascent of the Venstre Reform Party under Johan Deuntzer and was in office when his country lost Schleswig-Holstein.. The fourth ruler of this name, the longest reigning monarch of his nation, was forced to accept the Treaty of Bromsebro, which undid some of the successes he had achieved in the Treaty of Knared. The tenth ruler of this name apocryphally wore a Star of David on his sleeve to protest against the treatment of Jews in his nation. For 10 points, give this name of many kings of Denmark.
One ruler of this name was repulsed at Brunkeberg by forces under Sten Sture the Elder, ending his hegemony over a neighboring nation that he had obtained after the ousting of Charles Knutsson.
Christian