Stosh, of Polish origin, is a variant of the name Stanislaus. It means 'glorious' or 'famous warrior'. The name gained popularity through the Polish poet and dramatist Adam Mickiewicz's character Staszek, which is an affectionate diminutive form of Stanislaw.
"Stosh experienced a notable increase in popularity between 1987 and 1990, with births peaking at 7 that year. However, it seems the name's usage has been relatively consistent over time, with an average of about 5 births per year over the given period."