<page_title> List of rulers of Brittany </page_title> <section_title> House of Thouars </section_title> <table> <cell> Alix (Alis) 1203-1221 with Guy as regent (1203-1213) with Peter I (1213–1221) <col_header> Name </col_header> </cell> <cell> 1200 eldest daughter of Guy and Constance <col_header> Birth </col_header> </cell> <cell> 21 October 1221 aged 21 <col_header> Death </col_header> </cell> </table>
Alix of Thouars (1200 – 21 October 1221) ruled as Duchess of Brittany from 1203 until her death.