Marcellina a noted female pupil of Carpocrates (q.v.), commenced teaching at Rome the Gnostic system of her instructor, in 160, under Anicetus, and met with so great success (see Ireneus, Adv. Haer. 1:25, 6; Epiphanius, Haer. 27, 6) that her followers and pupils were denominated Marcellinists. This is the sect mentioned by Celsus (Orig. c. Celsum, vol. v), and are not to be mistaken for the followers of Marcellus of Ancyra, the Marcellians. Origen asserts that he could find no trace of the Marcellinists. Another Marcellina was the sister of Ambrosius, and a strict ascetic. — Herzog, Real- Encyklopädie, 9:20; Pierer, Universal-Lexikon, 10:855.