When Mary F Ashbrook was born on 26 November 1901, her father, Howard Rosco Ashbrooke, was 34 and her mother, Anna Belle Crittenden, was 19. She married Bonsell Cox on 10 April 1920. They were the parents of at least 1 son and 1 daughter. She lived in Centralia, Marion, Illinois, United States in 1910. She died on 9 January 1984, in Peru, Miami, Indiana, United States, at the age of 82, and was buried in Peru.