When Evariste Adam was born on 22 October 1811, in Plattenville, Assumption, Louisiana, United States, his father, Andre Allen Adam, was 25 and his mother, Celeste Marie Roger, was 20. He married Marie Philonise Guillot on 26 February 1838, in Thibodaux, Lafourche, Louisiana, United States. They were the parents of at least 7 sons and 4 daughters. He lived in Lafourche, Louisiana, United States in 1860 and Ward Ten, Lafourche, Louisiana, United States in 1900. He died on 28 November 1901, in Louisiana, United States, at the age of 90, and was buried in Holy Rosary Cemetery, Larose, Lafourche, Louisiana, United States.