When Mary Johnson was born in 1750 in Prince William, Virginia, her father, Jeffry, was 25, and her mother, Sarah Presley, was 19.
Mary Johnson married Anderson Cockrell in 1765 in Virginia. Their children in order of birth were: William, Hezekiah, Hanna, Rosanna, Reuben, and Sarah Ann “Sally”.
She died in 1791 in Fauquier County, Virginia, at the age of 41.