Whose great great great grandson of an ex. American President is making the media rounds?

You might be thinking of Bertram Hayes-Davis, the great-great-grandson of Jefferson Davis (who was President of the Confederate States of America). He’s been in the news because he supports the removal of Confederate flags and statues from public property.

That’s it. Thanks @SavoirFaire
But why isn’t the name Davis missing in Wikipedia:
I see Rutherford B. Hayes
https://en.wikipedia.org/wiki/List_of_Presidents_of_the_United_States

Because Davis wasn’t a President of the United States. He was the president of the loser, traitor army of the Confederacy.

Ok, that makes sense.