Gabriel Knight: Sins of the Father insanely obscure question.

So I'm on a bit of a retro game binge and am playing through the classic adventure game "Gabriel Knight Sins of the Father" and something is driving me absolutely crazy about it. I've visited and talked with Gabriel's grandmother and she told me to go to the cemetery and visit the family tomb. I see all sorts of names in on the tombs except for "Knight". Gabriels grandmother's tomb is there but after going back through the conversation with her, I don't think that's what was being discussed at all.