1286, William de Cornubia born in England, s/o 30422194. Walter of Cornwall & 30422195. Margery ?.
~1290, isolda born in England.
7/7/1307, Edward II succeeded Edward I as King of England.
1310, Stephen de Haccumbe and Ismania, wife that was of John de Cheverston, … summoned to answer William, son of Walter de Cornubia and Isolda his wife, Roger de Percy and Joan his wife, of a plea that they render to John, son and heir of John of Chevereston, whose wardship belongs to the said William, Isolda, Roger and Joan, for that John de Chevereston held his land of them by knight’s service. (S) Publications of the Selden Society, V20, 1905, P98.
1313, Walter, knt. of Branell, Cornwall died; William his son, aged 26, is his next heir. (S) CIsPM.
4/2/1313, Order to the same to deliver to William de Cornubia, son and heir of Walter de Cornubia, tenant in chief, the lands late of his said father, he having done fealty. (S) CFRs.
3/6/1316, William de Cornubia presented William de Scothowe, clerk, at St. Stephen’s-in-Brannel. (S) The Register of Walter de Stapledon, Bishop of Exeter, V2, P258.
By 1319, William de Cornewaille v. Seman son of Henry le Seriaunt de Suthwelde. At Great Yarmouth; taking of goods worth 100s.
4/25/1320, Licence for William de Cornubia to enfeoff Isabella de Bouleye of his manor of Branel, and for her to regrant it to the said William and John his son and the heirs of the said John. (S) CPRs. [Possibly a marriage settlement. (S) Journal of the Royal Institution of Cornwall, 1907, P417.]
6/5/1322, To the sheriff of Devon. Order to supersede the king's aforesaid order … Richard de Chaumbernoun, Baldwin le Flemyng, …, William de Cornubia, John Daumarle, John Burnel, Hugh de Chaumbernoun, Oliver de Chaumbernoun, Richard de Merton, and Robert Beaupel, and to restore their lands, etc., as the king learns by the testimony of W. bishop of Exeter, his treasurer, that they are and were at the time of the common summons of his retinue and were journeying to the king with the bishop and other men-at-arms and footmen when the king ordered the bishop not to come. (S) CCRs.
By 1323, William knighted.
1323, William de Cornubia, of Kingsnimton, knight. (S) Note-Book of Tristram Risdon.
6/8/1327, Commission to Stephen de Haccoumbe, William de Cornubia and Henry Bokerell’ to enquire by jury of the county of Devon as to piracies committed on that coast, to arrest … (S) CPRs.
1327, William de Cornewaille (Cornwall), knight, states that the sheriff by colour of his bailiwick has come to his manor and took his corn and chattels, and by distraints of his arable so that he could not cultivate his lands to his damage to force him to sell his land to him. He also has seized the dower lands of his late mother and holds Cornewaille out of the land so that he can't recover it because of the support he has in the country. John Treiagu (15210406), Sheriff of Cornwall; Margery de Cornewaille (30422195), mother of the petitioner. (S) UKNA.
4/2/1331, Writ of aid for purveyors of the queen’s household … William de Cornewaille. (S) CPRs.
By 1343, William died.
Child of William and Isolda:
i. John de Cornwall (7605202), born ~1310 in England.