“Ancestoir” is a term I invented to help differentiate regular memoirs from those with a dominant ancestral theme in them. As a genealogist, I am constantly looking for and reading this sort of book, so I feel that it deserves a genre of its own!
I'm a professional genealogist,university adjunct, and former literary agent's memoir reader. My favorite genre is memoir with family history or ancestral threads/themes. I call it "ancestoir."