Mieczislaw (Burislaf) I of Poland , Duke of Polan
Mieczislaw (Burislaf) I of was born about 0922 in Poznan, Poland.  He died on May 25th, 0992.

 Thyra Thyra Haraldsdottir
Thyra was born before 1000.  She died on September 18th, 1000.

 Boleslaw I the Brave of Poland , King of Poland
Boleslaw I the Brave of was born about 0967.  He died on July 17th, 1025.