I have an interesting bit of genealogy handed down from an ancestor in my mother's family. It's a little poem, composed by someone who must have been the family historian of the day. I suspect it was originally oral, luckily someone wrote it down.
Polly, Emily, Billy, Rich
Silent Tim, Beat and Sis
Jane, Joe, Suse and Sal
Abe and Low
Bess and Cal
My mother can identify some of them, but not all. I take it out and ponder it from time to time, to see if it offers any new clues or matches up with any of my research.
I imagine our ancestors probably did more of this kind of "genealogy", especially if they weren't very literate.
J.