Geoffrey FitzGeoffrey de Mandeville, 2nd Earl of Essex

Geoffrey de Mandeville FitzGeoffrey, 2nd Earl of Essex and 6th Earl of Gloucester (c. 1191; † February 23, 1216 ) was an English peer and member of the House of Lords. He is shown not least by his marriage as one of those nobles who opposed King John. Geoffrey de Mandeville FitzGeoffey must be distinguished from its predecessor Geoffrey de Mandeville, 2nd Earl of Essex, who died in 1166.

Geoffrey inherited the county of Essex in 1213 from his father Geoffrey Fitzpeter. He married his first wife, Matilda, daughter of Robert FitzWalter of Woodham Walter, Essex, the head of the noble opposition against King John, which led to the signing of the Magna Carta. She died 1212 and was buried in Dunmow Priory.

On January 20, 1214 he married Isabel of Gloucester, daughter of William FitzRobert, 2nd Earl of Gloucester, after their marriage had been annulled with John Lackland; the political dimension of this marriage becomes clear that Isabel was significantly older than Geoffrey, estimated at 15 years. She had in 1213 by the death of Isabel's nephew Amalric VI. of Montfort, the county Gloucester get back, so that Geoffrey and now - was the Earl of Gloucester - in the name of his wife. For his participation in the struggle of the barons against King John, he was excommunicated on December 16, 1215 - four days later, on 16 December, his property was already in the hands of Johann partisan Savary de Mauléon. A short time later Geoffrey was fatally injured at a tournament in London.

Both marriages Geoffrey remained childless. Isabel graduated in September 1217 Hubert de Burgh, the future Earl of Kent, a third marriage.

Geoffrey was buried in Trinity Priory in Aldgate. Successor as Earl of Essex was his brother William de Mandeville FitzGeoffrey.