(Latin: Guilelmus de Villanova) (French: Guillaume de Villeneuve) was a Roman Catholic prelate who served as Bishop of Trieste (1327–1330), Bishop of Sagone (1323–1327), and as an auxiliary bishop of Khanbalik.
[2] On 23 July 1307,[2] he was named by Pope Clement V along with six other Franciscan bishops (Andrew of Perugia, Andreuccio d'Assisi, Gerardo Albuini, Nicola da Banzia, Ulrico von Seyfriedsdorf, and Peregrino da Castello)[3] to travel to China to consecrate John of Montecorvino as Archbishop of Khanbalik.
[2] He was consecrated in the same year by Niccolò Alberti, Cardinal-Bishop of Ostia.
[2] It is uncertain whether he actually travelled to China where Montecorvino was resident or was assigned a geographic area of responsibility with it being most likely that he worked as a missionary bishop traveling throughout the regions occupied by the Mongols.
[2] On 28 Feb 1323, he was appointed by Pope John XXII as Bishop of Sagone.