Malvoisine, Or Mawmoisine, William De, a Scottish ecclesiastic, died Jnlv 9, 1238. He was educated and perhaps born in France, but was at an early age archdeacon of St. Andrews. In 1199 he became chancellor of Scotland, in 1200 bishop of Gla sgow, and in 1202 bishop of St. Andrews, retaining the latter see until his death. In 1211, as papal legate, in concert with the bishop of Glasgow, and at the request of the pope, he convened a council of the clergy and people at Perth to urge an expedition to ihe Holy Land. In 1214 he officiated at the coronation of Alexander II., and from 1215 to 1218 attended the fourth Lateran council as one of the representatives of the Scottish church. He was a zealous churchman, and, according to Fordun, was equally zealous in support of his personal rights, having deprived the abbey of Dunfermline of the presentation to two livings because its monks had once neglected to provide him with wine for supper. He introduced new monastic orders into Scotland, established many Dominican and other convents, and wrote the lives of St. Ninian and Kentigern.