sentences:  Gerard Labuda said that Zemuzil was most likely related to the Piasts through his mother.Rymar says that the 1040 document is one of the reasons why Zemuzil is sometimes thought to be related to the Polish Piast dynasty.Stanisław Zakrzewski believed the duke to be a brother of the Dytryk proposed as the father of Sememizl by Labuda, and also hypothesized that Zemuzil was an ancestor of Świętobor.