Stark is strong in German so that would be a strong-wheat-beer... Bocks are strong so it makes sense. Sweet glass BTW.
I made a Weizenbock and have been told by family that it is one of my best yet! I made mine by using a Dunkleweizen recipe and really upping the alcohol content. It was like an amazing dark wheat beer with a kick. I loved it! I can post the recipe if anyone is interested.