Surname origins

I found something really neat regarding surnames. There's a site called World Names Profiler. You simply enter your surname and find its origin and density on a world map. The site has been compiled by researchers from the University College London.

According to the site's data, my name is Polish, but its highest concentrations are in Hungary and Austria. Poland and Canada are almost a tie for 3rd. Now, according to my late Opa, the evolution of the name went from Plac to Plas, to Ples to Plesz. Ples is predominant not only in Hungary and Austria, but also Slovenia. So perhaps the name's heritage is Slavic.

Cool.