I did google it (with some trepidation) and see that only extreme right wing publications are the only sources, including the citation in Wikipedia.  However that doesn't make it untrue (just suspicious).  That said, let me clarify the bias you have additionally thrown on to the story.

1) it was her grandmothers name
2) Comey hadn't been fired yet
3) Hillary really was being investigated -- yes, really.
4) Hard to see how someone could be guilty of a felony prior to even a complete investigation, let alone a trial.

Why do you come here to tell this site of no integrity if it so irks you?