Mary Blake the Daughter of William Blake was Born the 20 : 1 : 1654; or 1655. [Note: In old-styles dates, the first month is March. More info may be found here.]
Children of William and Anna --- Blake: 4) Mary, b. Dorchester 20 Mar 1654/5, m. (1) Milton 15 Dec 1679 Joseph Leonard, m. (2) Mr. Willis. Will of William Blake, dated 1703, names daughter Mary Willis [among others].