BRISKO
We are having a young guest (male) who goes by BRISKO. He claims it's Slavonic and means "wise." My guess would have been >FRISCO >FRANCESCO. I can't find it in any of my books.
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I forgot to say that the boy is German with a German mother, an American father, and a French grandmother. Unfortunately I won't have a chance to ask the parents where they got the name from.