Pennus
i. e. "sharp" (pennum antiqui acutum dicebant, Isid. Orig. 19.19), was a family-name in the Junia and Quinctia gentes. In the latter gens it always occurs with other surnames, under which the Quinctii with this cognomen are given [CAPITOLINUS, QUINCTUS, Nos. 7, 8, 9; CINCINNATUS, No. 3]: the Penni of the Junia gens are given below.
From William Smith (ed.), Dictionary of Greek and Roman Biography and Mythology. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.