Of the sea or warlike
Marrio is a rare variant of Mario. It likely stems from the Roman name Marius, which is either derived from the Roman god of war, Mars, or from the Latin 'mare', meaning sea.
Less common today
Marrio isn't in the latest US Top 1000. It last peaked at #8,539 in 1990.
US births per 5-year period, 1990βpresent (SSA data).