I think that your Joseph Hnat is definitely the son of Louis G. Hnat and Susan E. Balaz. They were married 19 Jan 1901 in St Joseph Slovak RC Church in Hazleton, PA
Louis was born in Brodske, Slovakia 12 June 1875. He stayed with his sister, Helena, and brother-in-law, John Hladik (Ladick in the Americanized form). Helena Hnat Hladik was my grandmother.
I agree that Margaret Hnat's parents were Joseph Hnat and Helen Sabol. Helen Sabol's parents were Michael Sabol and Veronica Bell. She was born in Freeland, Foster Twp. 15 Dec 1904.