Mieszko I Von+ Schlesien
Mieszko I Von+ was born about 1138 in Of, Wroclaw, Poland.  He died on May 16th, 1211.

 Ludmilla+ X
Ludmilla+ was born about 1165.  She died on October 20th, 1211.

 Kasimir I Von+ Schlesien-Oppeln
Kasimir I Von+ was born about 1200.  He died about 1230.