This is a link to Ontario County Surrogate's index for Taylor on FamilySearch.https://familysearch.org/pal:/MM9.3.1/TH-1942-24586-24911-32...
As you'll see there's no Aaron. If you have other evidence that Aaron Jr.'s father is Aaron, great, otherwise consider an alternative. My 2g grandfather Harvey Ray Jr's father was Robert. That fact created a brick wall for many years.
Upon learning of the availability of these records I found a will in Livingston Co for my 4g grandfather. We'd had HIS name wrong, but the will made clear he was the man we were looking for. Give some of the others a try; there may be some clues
Or maybe Aaron Sr died at a child's residence outside Ontario County.