Dictionary of Medieval Names
from European Sources

Marianus m. A derivative of Latin Marius.

The name is sometimes treated as a masc. of Mariana (cf. Mary and Mary-Anne). In the early Christian era, Marianus was also treated as an adjective meaning 'of Mary'.

Finland
Early Modern Swedish
1582 Mareina (nom) Audén1980 p. 172
Italy
Latin
1522x1532 Marianus (nom) DSF p. 52, 30; 1527 Mariani (gen) Rome1527 p. 89
Italian
1513x1521 Mariano LeoX p. 15
Cite as: R. Le Get, S.L. Uckelman. "Marianus". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Marianus.