English, German and French, also found in many other European countries.

Marius was a Roman family name, probably derived from Mars, the Roman god of war. However Marius is also found as the masculine form of Marian and of Maria, which is derived from the Biblical name Miriam, of uncertain meaning.

The Roman family name Marianus, from which the masculine version of Marian is derived, came orginally from Marius.