Hillel Eisenfeld (c.1855) immigrated to the United States from his native Poland as a young man but eventually returned to Europe. He married Merl Flicker. Hillel and Merl Eisenfield had six children, Kalmen, Moishe, Eliezer, Surchie, Chaim Wolf, and Herman.
Kalmen Eisenfeld died died in 1918, during the influenza pandemic. His son Otto (Osias) Eisenfeld (1895-1983) served in the Austro-Hungarian Army during World War I and immigrated to the United States sometime after 1918. Erna Nager Eisenfeld also immigrated from Rzeszow, Poland. Otto and Erna Eisenfeld married in Carnegie, Pa. in 1924 and had three children: Kalmen “Kelvin” Eisenfeld, Sidney Eisenfeld and Jake Eisenfeld.