John,
Most everything that I have was from you or the info on the 1880 Census. The info I have is on Mary and Daniel. I have Mary's death as 1943 in Shadeyside, Martins Ferry, OH and buried in the Riverview Cemetery with Daniel so I think the info you have from the SSI Index is not our Marry.
Sorry I am not much help on her parents at this time. If you would like copies of all the census records that Mary is listed on I will gladly e-mail them to you.

Cheers!
Mike