Cōpōnĭus, a * The name of a plebeian family at Rome, e. g. the two brothers, T. and C. Coponii, Cic. Cael. 10, 24; id. Balb. 23, 53.—Hence, Cōpōnĭānus, a, um, adj., of or pertaining to Coponius, Cic. Att. 12, 31, 2.
Charlton T. Lewis, Charles Short, A Latin Dictionary
PIR
Male Personal name Confirmed occurences in the Roman Empire:
Coponius (Masc, eques), ref: PIR C 1285 | PIR ID4755
...tilius Vatia Valerius Marius Coponius Atticus (Masc, senator), ref: VI 41074 | PIR ID13134