Meaning & Origin
a male given name, equivalent to English Marius
Mariusz is a boy's baby name of Polish origin, the Polish form of Marius, derived from the Roman family name Marius, possibly connected to Mars — the Roman god of war — or to the Latin mare meaning 'sea.'
Marius was the name of one of Rome's greatest military commanders, Gaius Marius, a seven-time consul. The Polish form Mariusz carries this classical heritage into a distinctly Central European form, popular in Poland and among the Polish diaspora worldwide.