Sometimes there is a tag on the axle, I know some al-ko axles have an aluminum band tag on them, or a stamp on them.
Sometimes the drum or hub will have the name on as well, some dexters do this.
Probably need to dig a little deeper.
Also equalizers will probably be different brand than axles. Probably all of them are from overseas.
Alko has several locations world wide and a plant in elkhart, IN and even one down the road from me about 25 miles in Shawnee, OK.
MillerTime- Future Sabre Handler!!