KUHAR is a somewhat common name in many Slavic countries. The name simply translates to - cook.
John may have been Iwan (sounds like eevon and means John) There is a record at Ellis Island for Iwan KUHAR arr October 03, 1909 Race of People Ruthenian from Bilcz, which was in the Austrian province of Galicia but after WW I became part of Ukraine. It is located 346 miles west of Kiev. His destination however was stated as Cleveland to bro in law, the manifest indicates he became a US citizen 3-14-40
Searching Ellis Is for female P STUPAK find only 1 Paranka arr 1910 age 22 single also Ruthenian Race destination Johnstown PA to a brother from Posady Austria which may be now in Ukraine. However it appeas most STUPAK females arr 1892-1913 are from Russia.http://www.jewishgen.org/databases/EIDB/ellis.html
Michael would be MIKHAILO
Croatian Heritage Museum