Ken,
When Gen.Albert Pike came to I.T. to sign up the five civilzed tribes for the southern cause,Confederate he was big on the freemasons. 1861
There being three lodges in Indian TerrritoryCherokee,Creek,Choctaw(Doaksville)it looks likely he had names of lodge members.
We may never know for sure but the names of many stick out/many members may-not be listed.
I think the freemasons helped him a great deal,from the sign up to the makeup-officers, of the Confederate Army in I.T.