Betty, Yes, this can be very frustrating! It is so hard to get information, and with name changes and different spellings.
Janos was also Ioan or Joan. When he came to U.S it became John Phillips. For Filep, sometimes I find Filip.
I wish I new how to get more information, and like you said there should be a connection somewhere. I wish I knew his grandfather or Uncles names where he went to live, and there were cousins there also. On one document, my uncle's baptism in Detroit it shows his God Mother as Roja or Roza Filip, but I do not know if they were related or not. What other info have you been able to come up with? Keep in touch Nancy