What is "lasowiacy"

The Lasowiacy or Lesioki, are a subethnic group of the Polish nation, who reside in Lesser Poland, at the confluence of the Vistula and the San rivers, Subcarpathian Voivodeship, southeastern Poland. They are descended from various ethnic groups, which settled in the dense Sandomierz Wilderness across centuries, with a dominant Polish element. The Lasowiacy were formed as a separate subethnic group in the late 19th and early 20th century. They use their own dialect, which belongs to Lesser Polish dialect of the Polish language. Like most Poles, the Lasowiacy are Roman Catholics.