Petro?

[W Brewer]

Petro Oleksiyovych Poroshenko:
Any expert Slavist perspective on the idionym <Petro>?
WB's reaction:  Boy, is that different from Russian <Pyotr>. Is <Petro> a
<<normal>> Ukrainian development? (No connection with petroleum? Chocolate.)
?? Russian borrowing of Italian <Pietro> --> Ukranian <Petro>??

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