Mary Van Atta
- Birth: 4 Sep 1805 in Beaver County, Pennsylvania
- Death: 18 Aug 1892 in Wells County, Indiana
- Mother:
- Father:
- Married: John Lash (born Abt 1792 in Washington County, Pennsylvania, died Abt 1847) on Abt 1825 in Washington County, Pennsylvania with children
- John Lash (born Abt 1837)
- Eliza Ann Lash (born 10 May 1839 in Tuscarawas County, Ohio, died 12 Jun 1885)
- Mary Ann Lash (born Abt 1841 in Tuscarawas County, Ohio, died 1904)
- Joseph Lash (born Abt 1843)
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