Other names: Jacobus de Bononia (Pirrotta, MGG), Magister Jachobus de Bononia, Jacobus Bononiensis (Villani)
Evidently a native of Bologna, Villani tells us Jacopo worked together with Giovanni da Cascia at the court of Mastino II della Scala in Verona. His texts also identify him with the Visconti in Milan. Also a music theorist.