While reading through The Gunslinger, I came across the following line in the 2nd paragraph of Chapter 5:
sullen, inbred clan-fams, toiling silently in the fields by day.
I googled the term and it apparently has no (obvious) meaning. I also thought it might have been a typo of my e-version (originally corn-farms, perhaps?), but the link on Google Books I just posted has the same expression, so it seems unlikely. I'm guessing it is just an in-universe term.
What are clan-fams?
Please avoid spoilers regarding the book's plot. If necessary, use the spoiler tag in your answer.