I was not able to find the Wagner/Waggoner's that you are looking for in any of the Auglaize Co., Cemetery records. There is a Rachel Wagner listed in Auglaize Co., Probate Death Records Vo. 1, 2 & 31867 to 1898 that sounds like it could be her. No Abraham at all.
Wagner, Rachel birth place ___80y9mdate of death 28 Aug 1891Clay twp.paralysisvol. 2 page 6w
Wagoner Johnbirth place Ohio48y1m13d. date of death 11 July 1869 Logan twp. consumption Vol 1 page 19
There was a John Wagner with wife Sarah Phillips and John Wagner and Eliza Montage listed in some of the cemetery books so this John (above)could be one of them.
Sorry I couldn't help you more. Good Luck! Are they still in Auglaize Co in 1870/1880?