Genealogy / Nawrot surname source (Jewish converts to Catholicisim?) [7]

I once read something online about the Nawrot surname being a common name among Polish Jewish converts to Catholicism. I believe it claimed that Nawrot was a river that translated into Renewal, and was used for baptisms. I lost track of the source until it was recently repeated here by Polonius3. I'm hoping he can help me identify the source of this. I've long believed that my wife's family from Krakow had Jewish heritage.

Thanks for providing this forum, I've been lurking since the Google search that got me here and I am happy to report that my beautiful Polish wife is neither catty or miserable and that most of the Polish women I've met aren't either. :)

We've been together for over 10 years and married for 2. We now have a beautiful daughter and the site of my wife with her to me is the most beautiful image I can imagine.