Mieszko II Lambert - King of Poland from 1025 until and then Duke of Poland from 1032 until He was forced to flee Poland in but returned in He married Richeza of Lotharingia and had three children. My GGF
June 1305 - King Wenceslaus II of Bohemia and Poland, died at Wenceslaus II died probably of tuberculosis. He was succeeded by his son, Wenceslaus III (Václav III.), the last of the Přemyslid kings in the male line.
Saint Hedwig, Queen of Poland Born, Died, 17 July 1399 during child birth. Hedwig was the youngest daughter of King Louis I of Hungary. Because she was great-niece to King Casimir III of Poland, she became Queen of Poland
Dobrawa of Bohemia (ca. – Two independent sources attribute to Dobrawa an important role in the conversion to Christianity of Mieszko I and with him, all of Poland. Ancestor to Queen Elizabeth II, according to Wikipedia.
Boleslaw V Wstydliwy - Bolesław V the Chaste, the Shy or the Bashful (Polish: Bolesław Wstydliwy) June 1226 – 7 December was Duke of Sandomierz in Lesser Poland from 1232 and High Duke of Poland from 1243 until his death.