The 19th century German historian Johann Ludwig Quandt believed that Zemuzil and other early Pomeranian dukes of the Griffin dynasty descended from Polish nobility of Lesser Poland, that Zemuzil was made a voivode of his duchy by the Polish king Bolesław I Chrobry, and that he was the grand father of Świętobor I.
In his 19th-century research, Johann Ludwig Quandt posited that Zemuzil and other early Pomeranian dukes of the Griffin dynasty had Polish noble ancestry. He also suggested that Zemuzil was appointed voivode by Bolesław I Chrobry and that he played a role in the lineage of Świętobor I.