Genealogy / Stupak family [4]

I am trying to find lost family members. My grand mother was Ulana Stupak, she married Petro Soroka in the early 1800's. they had children, the only one i know name of is my father Iwan Soroka born May 26, 1913, some where in Poland, the town i have is Tereschiwka, Poland. If you know of any family please contact me via this e-mail address.