<page_title> List of legendary rulers of Cornwall </page_title> <section_title> Historia Regum Britanniae </section_title> <table> <cell> Cador <col_header> Name </col_header> </cell> <cell> Duke/king <col_header> Title </col_header> </cell> <cell> Historia Regum Britanniae <col_header> Sources </col_header> </cell> </table>
Cador was a Duke of Cornwall, known through Historia Regum Britanniae.