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/publicwww.iarelative.comwww.our-slovakia.com
Take a look in Ellis Island website. There were ROSKOs, ROSZKOs, and OLSEYs.www.ellisislandrecords.org