Henry Symeonis

Henry Symeonis (fl. 1225–1264) was a wealthy Englishman from Oxford, who became the target of a "very strange" 550-year-long grudge at the University of Oxford. Until 1827, Oxford graduates had to swear an oath never to be reconciled with Henry Symeonis—despite Oxford apparently having forgotten by the 17th century who he was or what he did. His identity was only rediscovered in 1912. Provided by Wikipedia