What First Family would be complete without a cast of friends, allies, and romantic interests? It's about time the supporting characters of the FF get some attention of their own! True, only a few of them are featured outside of the FF for any length of time, but that shouldn't diminish their status. Here then, to start off, are the first appearances of five from the Silver Age.
ALICIA MASTERS, Fantastic Four #8
WILLIE LUMPKIN, Fantastic Four #11
WYATT WINGFOOT, Fantastic Four #50
SERGIUS O'HOOLIHAN, Fantastic Four #79
AGATHA HARKNESS, Fantastic Four #93
More to come. Feel free to talk about their appearances outside the FF, and add others as well.