Kashubians
Kashubians or Kassubians came into the region between Oder and Vistula river over a thousand years ago. They lived in that part of the land, later called Pomerania, named after the Pomeranen, who also moved there . They were subjects of the Holy Roman Empire. Their capital city was Kolberg in Pomerania. They spread and came to live east of Danzig. They were a small minority in Pomerania.
Some 200,000 Kashubians still speak Kashubian, a West Slavic dialect, mainly in north central Poland.