Bierce was born in a log cabin at Horse Cave Creek in Meigs County, Ohio, on June 24, 1842, to Marcus Aurelius Bierce (1799–1876) and Laura Sherwood Bierce. He was of entirely English ancestry: all of his forebears came to North America between 1620 and 1640 as part of the Great Puritan Migration. He often wrote critically of both "Puritan values" and people who "made a fuss" about genealogy. He was the tenth of thirteen children, all of whom were given names by their father beginning with the letter "A": in order of birth, the Bierce siblings were Abigail, Amelia, Ann, Addison, Aurelius, Augustus, Almeda, Andrew, Albert, Ambrose, Arthur, Adelia, and Aurelia. His mother was a descendant of William Bradford.