Siemowit of Bytom
Duke of Bytom during 1312–1316 and Duke of Gliwice from 1340 until his death
(1292–1342)
Parents
Helena
Casimir of Bytom
Children
Siblings
Bolesław of Toszek
Mieszko of Bytom
George of Bytom
Władysław of Bytom
Maria of Bytom