In summary, no, I don't have good evidence, just coincidence.
The conflict in our data is your Abraham married Lucinda Mize in 1831. The Abraham I have is also the brother of Samuel Taff who married Eliza Giltner (she'd be my gg?? Aunt). And, there is a marriage record of Sarah Giltner marrying Isaac Taff (brother of Abraham). I haven't linked it yet, but I believe this Sarah Giltner is the sister of Eliza and she married a Taff. In 1852, when her father died she was single and living on the family farm. Did she marry Isaac Taff after 1852? I don't have proof, so I should not have said that in my email.
As far as Abraham, I don't know where I got the Sallie Giltner marriage, but it came from somewhere (duh). I mean I wouldn't have recorded it as "Sallie" without that being in the record. I think I must have gotten it from Clark county records, but I probably speculated it as this Abraham Taff (there was another one, who served inthe civil war in Illinois).
So, the only thing I know with certainty is the ELiza Giltner and Samuel Taff as they are listed in ELiza's father's will. Unfortunately, this family scattered after the father's death in 1852 so it's hard to trace them all. Her sister Christena Giltner married John Payne and her brother James married Henrietta Rommel, and her brother Jacob K married a Sarah and her brother Andrew Jackson (mine) married Mary Jane Baird and they moved to Missouri.
Sorry to ramble, but this is a tough family (giltner and taff in Clark county) to trace. I have land records I'm going through now, but haven't gotten much done yet.
Will try to let you know how it comes out.