Namesakes
Bishops of Rome and the Popes:
1 pope
Marcellinus 296-304 
Notable Philosophers and Thinkers:
1 historian
Ammianus Marcellinus c. 325-c. 391
Saints:
7 saints
Saint Marcellinus ?-304
Saint Marcellus (a.k.a. Marcellinus) ?-304
Saint Marcellinus ?-304
Saint Marcellinus ?-320
Saint Marcellinus of Embrun ?-374
Saint Marcellinus of Carthage ?-413
Saint Marchelm (a.k.a. Marcellinus) ?-762