I want to know the answer to the following question:
Who was the Old Prussians ethnic group related to?
All the background I'm provided with is that "During the wars waged in the Baltic by the Catholic German Teutonic Knights; the lands inhabited by the ethnic group of the Old Prussians (the current reference to the people known then simply as the "Prussians"), were conquered by the Germans.". Is that enough to answer the question?
Answer: no