When Fredrick Charles Feldhahn was born on 11 January 1901, in Lowood, Queensland, Australia, his father, August Friedrich Feldhahn, was 30 and his mother, Augusta Louisa Bernhagen, was 27. He married Alice Maud Prince on 3 February 1934, in Gatton, Queensland, Australia. They were the parents of at least 1 son. He died on 9 June 1996, in Ipswich, Queensland, Australia, at the age of 95.