William VII (born Peter, Pierre-Guillaume) (1023 – autumn 1058), called the Eagle (Aigret) or the Bold (le Hardi), was the duke of Aquitaine and count of Poitou (as William V) between 1039 and his death, following his half-brother Odo.
[1] He was brother-in-law of the Holy Roman Emperor Henry III, who married his sister Agnes.
[1] William won his patrimony in a war with his half-brother Odo, who was killed in battle at Mauzé.
Geoffrey Martel refused to concede to him the territories gained in the reigns of his predecessors.
William set to work regaining his patrimony by force of arms.