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William FitzOsbern, 1st Earl of Hereford

Norman earl (c. 1020–1071)

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJul 10, 2026
Entity authorityQ1244579
Source-derived summary

William FitzOsbern, 1st Earl of Hereford, Lord of Breteuil (c. 1011 – 22 February 1071), was a relative and close counsellor of William the Conqueror and one of the great magnates of early Norman England. FitzOsbern was created Earl of Hereford in 1067, one of the first titles in the English peerage. He is one of the very few proven companions of William the Conqueror known to have fought at the Battle of Hastings in 1066. His chief residence was Carisbrooke Castle on the Isle of Wight, one of many castles he built in England.

Origins

William FitzOsbern was the son of Osbern the Steward, a nephew of Duchess Gunnor, the wife of Duke Richard I of Normandy. Osbern was the steward of his cousin Duke Robert I of Normandy. When Robert left the Duchy to his young son William, Osbern became one of Duke William's guardians. Osbern married Emma, a daughter of Count Rodulf of Ivry, who was a half-brother of Duke Richard I of Normandy. Through her he inherited a large property in central Normandy, including the honours of Pacy and Breteuil.

Editorial summary

This brief starts where responsible research should: with the source description of “William FitzOsbern, 1st Earl of Hereford” as norman earl (c. 1020–1071). Everything that follows is an evidence route, not borrowed authority.

Editorial reviewA concise reference frame for defining the subject, testing terminology and identifying the institution closest to the evidence. The current lead gives the account dated anchors—1011, 1071, 1067, 1066—that can be checked directly. The linked authority record independently contributes the date 1020-01-01. The account is most persuasive where William, FitzOsbern and Earl can be independently traced.
Editorial analysis

Why this record matters

The subject matters to the general reference register because the source frames it as norman earl (c. 1020–1071). Its deeper value depends on whether names, dates, institutions and citations support that framing.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jul 10, 2026. The linked authority identifier is Q1244579. VIAF identifies the subject as 1228155411321508940003. The Library of Congress control number is no2019046023. 1 of 3 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1011, 1071, 1067 and 1066.

Critical limits

A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

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Source & attribution

This entry incorporates text from William FitzOsbern, 1st Earl of Hereford” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.