William of Ware (called the Doctor Fundatus; flourished 1290–1305) was a Franciscan friar and theologian, born at Ware in Hertfordshire. He almost certainly studied at Oxford University and lectured on the Sentences of Pierre Lombard there, but he is not listed among the Oxford masters. There is some evidence, but no certainty, that he also taught at the University of Paris, perhaps lecturing there too on the Sentences. He was known as the Doctor Fundatus (established doctor) and less commonly the Doctor Praeclarus (very clear doctor).