My next question then, would be, any idea where any of them are buried? Tombstone info can be accessed at times, by folks that live in the area and are willing to take pictures.
Any guess on how old your Grandmother (or anyone else) might have been when she/they died?
I've been at this 35 years and it wasn't until just 4 years ago that I found my natural father (and there by, a half sister)! :o)