John Halgren of Abbeville (d.1237) was a French scholastic philosopher and writer of sermons, papal legate and Cardinal. In theology he was a follower of Peter the Chanter and Stephen Langton. After studying with Hugolino of Ostia at the University of Paris, he became dean of the chapter at Amiens in 1218; later he was archbishop of Besançon. He became Cardinal Bishop of Sabina in 1227. He visited Portugal and the extant kingdoms of the Iberian Peninsula as papal legate between 1227 and 1229, possibly 30 (H. Fernandes, 2006, pp. 168-169). He may have become dean of the Sacred College in January 1230, as the most senior Cardinal-Bishop after the death of Pelagio Galvani