William of Alnwick (d. 1333), English Franciscan theologian. William studied under Duns Scotus at Paris, and wrote the Reportatio Parisiensia, a central source for Duns Scotus’s teaching. In his own works, William opposed Scotus on the univocity of being and haecceitas. Some of his views were attacked by Ockham. See also DUNS SCO- TUS , HAECCEIT. J.Lo.