was the person to whom Longinus addressed his treatise Περὶ Τέλους, or De Finibus. (Longin. Fr. 5. ed. Weiske.) He was a pupil of Plotinus. (Porphyr. Vit. Plotin. 7.) A daughter of Marcellus studied philosophy, and married Porphyry, the biographer of Plotinus. (Cyril. contr. Julian. p. 209; Eunap. Vit. Sophist. Porphyr)