Complex sentence: The mazurek's name might have originated from the word Mazur (or Masurian) tribe inhabiting the Mazovia region of central Poland, or perhaps from the word (Polish for mazurka), traditional folk dance in triple metre from Poland.
Split into simpler sentences: The mazurek's name might have originated from the word Mazur (or Masurian) tribe inhabiting the Mazovia region of central Poland. The other theory says it comes from the word (Polish for mazurka), traditional folk dance in triple metre from Poland.