When Idyl Mae Mills was born on 3 April 1893, in Grayson, Texas, United States, her father, Elijah Pope Mills, was 43 and her mother, Mary Elizabeth Bartholomew, was 39. She married Roscoe Holley on 10 January 1910, in Hopkins, Texas, United States. They were the parents of at least 3 sons. She lived in Sombrio, Guadalupe, New Mexico, United States in 1930 and Election Precinct 25 Sombrio, Guadalupe, New Mexico, United States in 1940. She died on 27 September 1958, in New Mexico, United States, at the age of 65, and was buried in Clovis, Curry, New Mexico, United States.