Possible Clues:

• Breed of black-and-white cattle from northern Holland
• Dairy cow
• Place for a gun mostly in part of Germany
• Dairy cow type
• Breed of black and white dairy cattle from northern Holland
• Composer oddly overlooked Delian cow
• The Lions' fresh source of milk?
• Composer on vessel, heading off for German region
• Duchy, once the northernmost part of the Holy Roman Empire
• Type of black and white cow that produces a lot of milk