Geoffrey de Mandeville, Earl of Essex

Geoffrey de Mandeville II, 1st Earl of Essex (died September 1144) was a prominent figure during the reign of King Stephen of England. His biographer, the 19th-century historian J. H. Round, called him "the most perfect and typical presentment of the feudal and anarchic spirit that stamps the reign of Stephen". That characterisation has been disputed since the later 20th century.