No public IJR answers mention Geoffrey, Count of Nantes yet. As people ask about it and share their answers, they'll appear here.
Overview
Geoffrey VI was Count of Nantes from 1156 to 1158. He was also known as Geoffrey of Anjou and Geoffrey FitzEmpress. He was the son of Geoffrey Plantagenet and Empress Matilda. His brothers were Henry II of England and William FitzEmpress.