• Birth: Abt 1820 in North Carolina
• Death:
• Mother: Margaret Simms (born 1777, died 18 Oct 1852)
• Father: Martin Bierly (born 1775 in Rowan County, North Carolina, died 1 Oct 1859)
• Married: with children
  1. Hannah Byerley (born Abt 1839 in North Carolina)

The 1850 census shows her living with her parents, Martin and Margaret, in Marshall County KY, along with an 11 year old, Hannah. I am guessing Hannah is Mary's child.