William fitz Osbern

Events

Date of Birth: probably late 1020s.

Place of Birth: unknown.

Lewis (ODNB) states that he was of an age with William the Conqueror (born late 1020s). Stewart gives 1025 /1030 as an estimate.

Date of Death: 20 or 21 February 1071.

Place of Death: Kassel.

The date and place are given by Lewis (ODNB). William was killed in an ambush.

Place of Burial: Cormeilles.

The place is given by Lewis (ODNB).

Relationships

Father: Osbern de Crépon.

This relationship is given by Lewis (ODNB), by van Houts (XII:231), and by Tanner.

Mother: Emma d’Ivry.

This relationship is given by Lewis (ODNB), by van Houts (XII:231), and by Tanner.

Spouse: Adeliza de Tosny.

This relationship is given by Lewis (ODNB) and by Stewart.

Children:

(Complete source citations for facts about the children on this page are currently outside of the scope of this project.)

William de Breteuil married Adeline de Montfort-sur-Risle.

Roger de Breteuil, earl of Hereford.

Rodulf. A monk at Cormeilles.

Emma married Ralph de Gael.

References

Lewis, C.P. “William fitz Osbern, earl (d. 1071)” in the Oxford Dictionary of National Biography (Oxford University Press, 2004).

Stewart, Peter. “Origin and early generations of the Tosny Family” (July 2009; rev. March 2012).

Tanner, Heather J. Families, Friends, and Allies: Boulogne and Politics in Northern France and England c. 879 - 1160. (Brill: 2004).

Van Houts, Elisabeth. “Robert of Torigni as Genealogist” in History and Family Traditions in England and the Continent: 1000-1200 (Ashgate, 1999).

Williams, Ann.”Ralph, earl (d. 1097 x9)” in the Oxford Dictionary of National Biography (Oxford University Press, 2004).