When Mabel Grace Ranstead was born on 15 August 1887, in Earlville, LaSalle, Illinois, United States, her father, Herbert Evelyn Ranstead, was 45 and her mother, Sarah Miller, was 37. She married Herbert LaVier on 30 August 1910, in Kane, Illinois, United States. They were the parents of at least 3 daughters. She lived in Justice Precinct 1, Harris, Texas, United States in 1920 and Meriden, LaSalle, Illinois, United States in 1930. She died on 2 February 1987, in Libertyville, Lake, Illinois, United States, at the age of 99, and was buried in Precinct Cemetery, Earlville, LaSalle, Illinois, United States.