http://maxpages.com/polandhttp://maxpages.com/poland www.halgal.com www.rootsweb.com/~polwgw/index.html www.pgsa.org www.kuijsten.de/navigator In 1990 census of names there were 21096 MARKIEWICZs, 3555 MARKOWICZs, and 33 SASIMOWICZs in Poland. www.herby.com.pl/herbyin Polish and only distribution. The English Y is a J sound so your Yaslow is Jaslow. There is a town Jaslo in Podkarpackie woj. - Galicia region, Poland. Might you have a better spelling of the village? Not related.