Can't say but it mostly has the right shape. I like the way the tang tapers down instead of being straight. Maybe someone started it and never finished.
Here's a blade I salvaged with a file and sandpaper. I made it a hidden tang since I'm no good at making knife scales. The wood is from the Locust tree with huge thorns.
I believe the first pic;s look like a knife , ( A pretty heavy duty one ) , I assume you (like) me would like it to be a confederate Bowie .
Good luck with yr ID & I hope it is a Rebel Bowie.