Hello Christine, My family come from villages just south of Lubaczow. I have come across the surnames Broziak, Brzozow(ski) and Bross in my research in the church registers. I have a list of surnames from the area that I asked a cousin (who still lives in the area) about. My notes show he said that there is a Bross family in Szczutkow, a village 8-10 km south of Lubaczow.
The church registers for Lubaczow and many of the villages around have been microfilmed by the LDS.
Hope this helps. Janet.