Casimir II the Just
He is mentioned in a documented on April 26, 1177 as a witness for the Lubiąż Abbey. He presided over an assembly at Easter 1179 and the Convention of the Polish bishops and barons organised by Casimir II the Just in 1180. He is mentioned in a Bull of Pope Alexander III dated March 28, 1181. The date of his death is not known but was probably in the 1180s.