Pr. Ziemowit of Poland
Ziemowit of Poland was born about 0835 in Poznan, Poland.  He died in 0892.

 Pr. Leszek IV (Lemzek) of Poland
Leszek IV (Lemzek) of Poland was born about 0865 in Gniezno, Poznan, Poland.  He died in 0921 in Gniezno, Poznan, Poland.