Saint Marcellinus was one of the companions of Saint Lucian, and assisted him in proclaiming the Gospel in the West.
The holy preachers sailed from Italy to Gaul (modern France). Saint Marcellinus and those accompanying him continued on to Spain. Saint Saturninus went to Gaul, and Saint Dionysius and the others went to the region of Paris. From there Saint Lucian went to Belgium with Maximian and Julian.