Genealogy / Szwachta Family [3]

Hello. I am looking for any information on my maternal great grandfather. His name was Josef Szwachta, born in 1870 and we think his father's name was Jakob. He was from Myslenice, Stroza. I have found two other references with this last name in WWI casualty lists (possibly related), but not much else. I think he had a brother Piotr who also immigrated to the US but spelled his surname Swachta. I have consulted numerous sources but cannot find much information on the Szwachta family or any other information on Josef's background. Any assistance or guidance is very much appreciated. Thanks!