When Clarance Ralph Letteer was born on 9 January 1889, in Bucklin Township, Linn, Missouri, United States, his father, William Henry Letteer, was 25 and his mother, Ida B Caton, was 22. He married Josephine Hutcherson on 17 March 1910, in Tulsa, Tulsa, Oklahoma, United States. They were the parents of at least 1 son and 1 daughter. He died on 22 September 1967, in Kentwood, Tangipahoa, Louisiana, United States, at the age of 78.