Is Finn Related To A Minor Character From Rebels?

As soon as the first teaser for The Force Awakens launched in November of 2014, speculation exploded as to the origins and/or family descent of the three lead characters of the Sequel Trilogy. Questions abounded as to Finn and his origins. Some of that speculation died down as the Sequel Trilogy continued, but I believe it's possible that Finn is related to a minor character we first met in Star Wars Rebels. Join me as I elaborate.