Or Egidius De RoYA (d. 1478), Flemish chronicler, was born probably at Montdidier, and became a Cistercian monk. He was afterwards professor of theology in Paris and abbot of the monastery of Royaumont at Asnieressur-Oise, retiring about 1458 to the convent of Notre Dame des Dunes, near Furnes, and devoting his time to study. Gilles wrote the Chronicon Dunense or Annales Belgici, a résumé and continuation of the work of another monk, Jean Brandon (d. 1428), which deals with the history of Flanders, and also with events in Germany, Italy and England from 7 9 2 to 1478.
The Chronicle was published by F. R. Sweert in the Rerum Belgicarum annales (Frankfort, 1620); and the earlier part of it by C. B. Kervyn de Lettenhove in the Chroniques relatives a l'histoire de la Belgique (Brussels, 1870).