Borrowed from German Bollenhut.

Bollenhut (plural Bollenhuts)

1. A formal headdress with woollen pompoms, worn since about 1750 by Protestant women as part of their folk costume in the three neighbouring Black Forest villages of Gutach, Kirnbach and Hornberg-Reichenbach.

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  Bollenhut on Wikipedia.Wikipedia
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  Bollenhut on the German Wikipedia.Wikipedia ^de

From Bolle +‎ -n- +‎ Hut (“hat”).

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• Hyphenation: Bol‧len‧hut

Bollenhut m (strong, genitive Bollenhutes or Bollenhuts, plural Bollenhüte)

1. Bollenhut

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  Bollenhut on the German Wikipedia.Wikipedia ^de