Polansball

 -he was one of five tribes of Western Slavs that showed signs of statehood.

History
His story is covered under a thick layer of mystery and legends. It is known that around 920 Goplansball subordinated to him. Taking advantage fall of the  Great Moraviaball decided to expand, increasing its territory three times, and began to build strongholds. In 966, under the influence of the Bohemia, he gets baptized and begins Duchy of Poland.