Maryl

You need to locate a name of a town in order to proceed with the research.
The surname ROSKO does list in Slovak Republic's phone book. www.zoznamst.sk
An unusual first name Makar. I have not come across it any where.
Some websites for your research.
www.iabsi.com/gen/public
www.iarelative.com
www.our-slovakia.com (Slovak Pride)
www.cgsi.org
www.ncsml.org
www.slovaklinks.com
www.tccweb.org
www.c-rs.org
www.rat.de/kuijsten/navigator
Take a look in Ellis Island website. There were ROSKOs, ROSZKOs, and OLSEYs.
www.ellisislandrecords.org