The question came up in tonight's chat about Roma, The Novel of Ancient Rome by Steven Saylor:
Were the Potitii an actual Roman family?
We know about the Pinarii, one was a brother-in-law of Julius Caesar, his son an adherent of Marcus Antonius.
A participant told us that she had found a mention in The Beginnings of Rome: Italy From the Bronze Age to the Punic Wars by T.J. Cornell. According to this (page 385), Appius Claudius Caecus "transformed the worship of Hercules at the Ara Maxima from a private concern of the Potitian clan into a public administered cult." Saylor, in his Author's Notes, writes that he began his research by "reading and reading" T.J. Cornell.