(fl 1362). French composer. He is known only from a two-voice Chace added in a blank space on the verso of F-CHRm 130, with the instruction ‘C’est une chace qui ce chante a .ii. Et le fit Frere Jehan Lebeuf d’Abbeville en Pontieu l’an 1362’. This lost manuscript is known primarily as an important source of 11th-century polyphony; the chace uses the circle and semicircle mensuration signs of the Ars Nova, although the notation is almost entirely in ligatures. For facs. and transcr. see M. Schneider: Geschichte der Mehrstimmigkeit, ii (Berlin, 1935, 2/1969), 53, suppl. 149.