When Paul August Fechtmeyer was born on 11 August 1889, in Chicago, Cook, Illinois, United States, his father, Henry Fechtmeyer, was 26 and his mother, Louisa Trenhertz, was 19. He married Mary M. Goldammer on 19 August 1908, in Chicago, Cook, Illinois, United States. They were the parents of at least 2 sons. He lived in Milwaukee, Milwaukee, Wisconsin, United States in 1920. He died on 19 April 1943, in Chicago, Cook, Illinois, United States, at the age of 53, and was buried in Norwood Park Township, Cook, Illinois, United States.