(adjective) : Marcus, i, m.
* A Roman praenomen, in gen. represented by M. simply, e. g. M. Terentius Varro, M. Tullius Cicero; written in full, MAARCVS,Inscr. Rein. 1006; MARCVS,Inscr. Fabr. p. 324, 450; p. 342, 528 et saep. Afterwards also a surname, e. g. C. PONTIVS C. L. MARCVS, Inscr. Grut. 986, 5.—Hence, Marcĭānus, a, um, , pertaining to Marcus, Marcian: sodales, the priests who performed the sacred rites instituted in honor of the emperor Marcus Aurelius, Capitol. Pertinax, 15; cf. Spart. Sever. 7; Inscr. Grut. 379.

Personal name
Confirmed occurences in the Roman Empire:

• P. Aelius P. fil. Aelianus Archelaus Marcus (Masc, senator), ref: PIR A 0130 | PIR ID757
• Aurelius Marcus (Masc, eques), ref: PIR A 1552 | PIR ID2597
• Aurelius Marcus (Masc, eques), ref: PIR A 1553 | PIR ID2598
• Aurelius Marcus (Masc, eques), ref: JRS 67 (1977) 50-61 | PIR ID2599
• Iucundius Marcus (Masc, eques), ref: PIR I 0068 | PIR ID7128
• C. Iulius Marcus (Masc, senator), ref: PIR I 0405 | PIR ID7603
• Iulius Marcus (Masc), ref: PIR I 0404 | PIR ID7604
• Iulius Marcus (Masc, eques), ref: P. Oxy. 3920 | PIR ID7605
• L. Marcius Celer Marcus Calpurnius Longus (Masc, senator), ref: PIR M 0221 | PIR ID8895
• Marcius Marcus Veracilius Verus (Masc, senator), ref: PIR M 0250 | PIR ID8917
• Marcus ... (Masc, senator), ref: PIR M 0269 | PIR ID8934
• Marcus (Masc), ref: PIR M 0270 | PIR ID8935
• Marcus (Masc), ref: PIR M 0271 | PIR ID8936
• Marcus (Masc), ref: PIR M 0272 | PIR ID8937
• Marcus Asellio (Masc), ref: PIR A 1210 | PIR ID8938
• Marcus Claudius ... Pontius Pontianus Marcellus ... (senator), ref: AE 2001, 739 | PIR ID8939
• Marcus Phaedrus (Masc, senator), ref: PIR P 0339 | PIR ID8940
• Memmius Marcus (Masc), ref: PIR M 0465 | PIR ID9151
• Aurelius Marcus (eques), ref: SB 12, 11033 | PIR ID14740