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Cognomen Petkow (Petkow , Петков , פטקוב ) , all over the world, is a common surname. The last name Petkow is characteristic of Eastern Europe, particularly Bulgaria, where it is a common surname, Moldova, where it is quite a rare surname, and Ukraine, where it is a rare surname. In absolute terms, the name is most common in Eastern Europe, particularly Bulgaria, Russia, and Ukraine.