As much as I have dug on CBF's family, the farthest I could get on her mom's side is the possibility that her Grandmother might be Margaret L Reamy…but even then, all of the obituaries for this woman does not have survivors listed (unless those were scrubbed). Zero records of Paula K Blasey's (Reamy?) father.
Either the name Christina Blasey Ford and Family do not exist past the present, or the internet was swept clean.