2. Tribune of the plebs, B. C. 56, was accused by Clodius in B. C. 54, together with his colleagues, C. Cato and Nonius Sufenas, on account of the violent acts which they had committed in their tribuneship. Cato and Nonius were acquitted, but Procillius was condemned. (Cic. Att. 4.15.4, 16.5, ad Q. Fr. 2.8.1; Drumann, Geschichte Roms. vol. ii. p. 339, vol. iii. p. 100.) This Procillius may have been the same person as the historian.