William de la Mare

William de La Mare (fl. 1272–1279) was an English Franciscan theologian.

Biography William de la Mare's origins are unknown. In Paris, he came under the influence of Bonaventura and Roger Bacon. He returned to England, and is known to have preached in Lincoln. The substance of the Correctorium was later printed (at Strasburg, 1501; Cordova, 1701, and elsewhere) with the reply to it under the name of Ægidius Colonna. De la Mare argues that, as the "principium individuationis" is, according to the Thomists, matter, and not form, individuality, according to them, ceases to exist as soon as the soul leaves the body; in other words, the Dominican school supported the Averroistic heresy of the universal soul.

De la Mare also wrote in favour of a strict observance of the rule of St. Francis. Among his extant works are: Quæstiones de Natura Virtutis, Burney MS. Brit. Library, 358; and Commentaries on the first three books of the Sentences, manuscripts of which are in the Laurentian Library at Florence, formerly in the Franciscan library of Santa Croce.