<page_title> Ad-Da'i Yusuf </page_title> <section_title> References </section_title> <table> <cell> Imam of Yemen 977–999 </cell> <cell> Imam of Yemen 1002–1012 </cell> </table>
Ad-Da'i Yusuf was an imam of Yemen, who ruled for two terms (977–999, 1002–1012).