When Harry Pfleiderer was born on 29 July 1887, in Bucyrus, Crawford, Ohio, United States, his father, Charles August Pfleiderer, was 39 and his mother, Clarissa Barbara Witzman, was 32. He married Mae Helena Bellamy on 12 October 1912, in Fort Wayne, Allen, Indiana, United States. They were the parents of at least 1 son and 3 daughters. He lived in Bucyrus Township, Crawford, Ohio, United States for about 40 years. He died on 13 October 1969, in Toledo, Lucas, Ohio, United States, at the age of 82.