Hi,
I think Marc is right: the first is definitely Konda and the second is definitely Yaka; I'm pretty sure the bottom left knife is a Kuba, the handle decoration is typical.
You can see a very similar one on the site of "Memoire africaine"
http://www.memoire-africaine.com/armes2.html
The last is more difficult: the scabbard seems to have been made from the tail of a small crocodile, so it could be from Sudanese area, probably the hypothesis that it is Ingessana (or Fur) is correct.
In the archive of Ethan Rider's photographs you can see a knife with a practically identical hilt, the blade instead is a little different.
https://ertribal.com/index.php/triba...ngessana-sudan
Greetings to all.