Mary was born in 1625 in Exeter, Rockingham County, New Hampshire, the daughter of unknown parents.
She died in 1667. The place is not known.
Her husband was John Firman Jr, who she married in 1649 in Long Island City, Queens County, New York. Their three known children were Rachel (1663-<1690), Jonathan (1667-1772) and Zelika (1671-?).