When Adoniram Judson H. Cox was born on 15 March 1839, in Marion, Mississippi, United States, his father, Lewis B Cox, was 33 and his mother, Nancy Hennesy, was 20. He married Elizabeth Ellen Lea on 22 December 1859, in Franklinton, Washington, Louisiana, United States. They were the parents of at least 3 sons and 3 daughters. He lived in Washington, Louisiana, United States for about 10 years and Ascension, Louisiana, United States in 1880. He died on 22 December 1907, in Myrtle Grove Plantation, Iberville, Louisiana, United States, at the age of 68, and was buried in Plaquemine, Iberville, Louisiana, United States.