William Fitzosborn De Breteuil 
William Fitzosborn was born in 1023 in Poitiers, Poitou, France. William Fitzosborn's father was Osbern De Crepon and his mother is Emma D'ivree. His paternal grandfather is Herfast De Crepon; his maternal grandfather is Ralph Count Of Ivree. He had a brother and a sister, named Osbern Fitzosbern and Emma. He was the oldest of the three children. He died at the age of 48 on February 20th, 1071 in Battle Of Cassel.General Notes
Nearest closest friend Of William the Conqueror. William FitzOsbern was am
ilitary adventurer on a grand scale. He was the son of Osbern one of Willi
am's murdered guardians, he became a close friend and stewart to William t
hen a Duke. At the Council of Lillebonne in 1066 he urged the Norman baro
ns to invade England and later played a leading role in the campaign comma
nding, the right wing at Hasting. He was rewarded with vast estates in Eng
land, notably in the Welch Marches. He re/built the Castles of Wigmore, C
lifford, and Chepstowe
‌William Fitzosborn and Alice were married in a religious ceremony in 1051.1 They had five sons and three daughters, named William Fitzwilliam, Roger, Ralph, John, Richard, Emma, Emma Fitzosborn and Adeliza.
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