Princess Wilhelmine Ernestine of Denmark was the third daughter of what king also known as Frederick II?
Princess Wilhelmine Ernestine of Denmark:  She was the third of five daughters of King Frederick III of Denmark and Sophie Amalie of Brunswick-Lüneburg. Frederick III of Denmark:  He also governed under the name Frederick II as diocesan administrator (colloquially referred to as prince-bishop) of the Prince-Bishopric of Verden (1623–29 and again 1634–44), and the Prince-Archbishopric of Bremen (1635–45).
King Frederick III of Denmark