On Sun, Jan 17, 2021 at 12:23 PM, Robert Hanna wrote:
"Your grandfather's gravestone might have his father's name in Hebrew"
If it was indeed unknown, it would be the generic catch-all "(Grandfather) son of Abraham/Avraham".
That would not, however, exclude the possibility that Abraham/Avraham was his name.....
Mike Coleman London U.K.