This has your ancestor as individual 1118.6 although it gives her birth year as 1866 (maybe a typo??).Her parents are John D MOCK and Susannah BROWN. They certainly ended up in Nebraska and originated in Bedford County, Pennsylvania which is an area where I research the MOCK name.
On this chart, I believe John D's parents are correct and suspect that the D middle initial is for his mother's maiden name.
I have a number of John MOCK ancestors from Bedford County, PA and it is quite a common name with a paucity of records to definitively sort them all out.I am not at all sure that the John MOCK who married Elizabeth BOWSER is the father of your John MOCK who married Susannah DONNER.No one has been able to provide me with information as to how they determined this alleged father-son relationship.
IF in your research you find documents to support this, please let me know.