Emma Fitz-Osborn or Emma de Breteuil, and later Emma de Guader, was a Norman noblewoman, the wife of Ralph de Guader and the daughter of William FitzOsbern, Lord of Breteuil and later first Earl of Hereford of a new creation, who was a cousin and close adviser of William the Conqueror. William's opposition to their marriage led to the unsuccessful Revolt of the Earls.
- Citizenship
- Kingdom of England, Duchy of Brittany
- Born
- 1059
- Died
- 1096
