I understand that earlier on there were relatives without last names that were later said to be Waynes (Philip and Agatha). And, of course, there was Silas. Later, post-COIE Philip got moved to the Kane side, and Nathan and Jacob added. I still don't know who Bette's dad is. I remember cousin Jane and her baby, but not what side of family she was from.

But were there any siblings or parents or cousins or whatnot from Martha's side of the family mentioned prior to Crisis?

Also, when did Martha get the maiden name Kane?