Zuech is specific to Trentino, Brez (TN) and Lana (BZ), Zueck is absolutely rare and specific to the province of Bolzano, Zuegg, definitely much less rare, is specific to the province of Bolzano and Lana in particular, could derive from archaic dialectal forms related to the German word ziege (goat), the German diphthong pronounces itself as u with the diaeresis, very closed, close as a sound a i.
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