Hello Eugy! "Der Vorfahre" would be "the ancestor", maskulin and "die Vorfahrin" the female version of it. "Das Vorfahren" is a combination of the präposition "vor" and "fahren", so a "Substantivierung" of the verb "vorfahren". It's naming the process of driving "vor", so is for example used like this: "Der Mann ist mit seinem Audi beim Hotel vorgefahren." I hope that clears things up! Greetings! Leo