Mariusz is a distinctive boys' name in United States, ranking #10486 in 2007 with 7 recorded births. This places Mariusz in the bottom 27% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2005 with 8 births ranking #8808. In 2007, approximately 1 in every 296,462 boys born was named Mariusz. FALLING Recent data shows the name is currently falling.