|birth_date=October 23, 1023<ref>https://www.geni.com/people/Pierre-Guillaume-l-Aigret-ou-le-Hardi-d-Aquitaine-VII-Duc-d-Aquitaine-V-Comte-de-Poitou/6000000009304954003</ref> | |birth_date=October 23, 1023<ref>https://www.geni.com/people/Pierre-Guillaume-l-Aigret-ou-le-Hardi-d-Aquitaine-VII-Duc-d-Aquitaine-V-Comte-de-Poitou/6000000009304954003</ref> |