I played it with my partner and we loved the Obra Dinn, so the Rootrees are Dead is right up our alley!
We did really well until 44/49, we gave up at first, then I replayed it and found more clues we missed or forgot to look! I even laid in bed and realized who the very last person to guess was...It's so good.
If you're stuck at that point, I would recommend to search unrelated spouses on the net(Women usually take the name of the husband, don't forget!), and to also not brush off businesses and fanbases.