came from Asia Minor and taught in Rome c. 180 as a disciple of Tatian (Eus. Hist. eccl. V 13.1–9). His works included a treatise against the Roman Marcionites (Marcion), whom he accused of divisiveness in their doctrine of first principles. He engaged Apelles in a disputation to show that the latter’s form of the single first principle doctrine was without merit.
K. Greschat, “‘Woher hast du den Beweis für deine Lehre?’ Der altkirchliche Lehrer Rhodon und seine Auseinandersetzung mit den römischen Marcioniten,” StPatr 34, 2001, 82–87.