Kutsko could be Ukrainian or Belarusian surname. spis2 also clusters with Poles living further north in Poland who are more east shifted than southern Poles. Maybe he has Polish ancestry from Mazovia? The other possibility he has Polish ancestry in Ukraine or Belarus. More likely from Ukraine, as Poles of Ukraine settled in what’s today south-western Poland, while Poles of Belarus and Lithuania settled in what’s today north-western Poland. That was after WWII ended.