Marcus /+ Marcellianus
- categoriae: vir , martyr
- diem natalis: ?
- diem mortis: circa 304
- beatificationis: non-existence
- canonizationis: non-existence
- other Roman Martyrology days: 18.06.
- other memorial days: non-existence
- ordo: non-existence
- conditor ordo: non-existence
- nomina: Marcus
- cognomina: non-existence
- epitheta: non-existence