John was born in Poland and worked at the Lancaster Steel Office. According to his World War II draft registration, he had a paralyzed hand. The 1940 Census shows the Mankows living in Caln with their two sons: Joseph (b. 1915) and Peter (b. 1918). In 1940, John - who was a pitman at Lukens Steel Mill - was naturalized; however, Mary - also born in Poland - was still an alien.