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Re: 2 German(?) surnames, 1 Italian
You'll find the origin of Passalacqua at http://www.ancestry.com/facts/Passalacqua-family-history.ashx and Dannenfeldt at http://www.ancestry.com/facts/Dannen-family-history.ashx. Bavaj/Bavai seems to be Italian rather than German but it's very rare and I have no idea of its etymology.
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