I am interested in any information on the Koba Family from the Tarnogrod Area in Poland. My Grandmother, Anastasia Koba immigrated to the United States with her sister Anna Koba in 1921 to join older sister Kataryzna Dey (Koba) in the Detroit, Michigan Area. Her parents, Jon Koba and Katarina Korolak died in 1918-1920; she left behind several siblings in the area including Maria, Basyili, Julia, Antonina and Olga. Any information would be great!