​ARISTIDES, QUINTILIANUS, the author of an ancient treatise on music, who lived probably in the third century A.D. According to Meibomius, in whose collection (Antiq. Musicae Auc. Septem, 1652) this work is printed, it contains everything on music that is to be found in antiquity. (See Pauly-Wissowa, Realencyc. ii. 894.)