Dear Bob Long,
I have to agree with you that your Grandma has the Native American Tribal look! ;) She resembles a first cousin very much. She probably is Shawnee.....and probably Cherokee and othe tribeal ancestry as well.
Personally speaking, I am Tecumseh`s 4 Gr. Granddaughter, (7th generation). I am the Holder of our Algonkian Nation Shawnee Tribe Kispokotha Sept`s Ancient Sacred Stonehead Warclub since presented in 1991. This piece was Tecumseh` personal favorite. My Vision Quest of rounding up our Tribal people has been a lifelong passion. I have always been interested in genealogy since early youth. I recently turned 49, and 40 years ago I was twice born of the Spirit, Y`shua is our Great High Chief, & soon coming Savior. Our Ancients worshipped Yo-He Wah, = YHWH, =Yahweh, as did our Ancient Hebrew Tribal Ancestors. Although I have Algonkian Nation Ancestry from both my parents, I am Powhatan, Shawnee, Cherokee, Creek, Wyandot, Seneca, Dakota, Delaware, Kanaway, Kickapoo, Muskogee, and Hebrew & other Tribal background as well.
All of this fits into Prophesy, so many of us finding our Native Tribal Roots. The Elhiea = Aliyeh = ingathering of the scattered tribes is presently taking place, and the ingathering of the "lost tribes", of the Hebraic tribes are returning to our Ancient homelands. In Holy Prophetic Scriptures in Jeremiah 31 (regather) & Ezekiel 36:24 (from all countries) it speaks of this ingathering that will eclipse the time when the Hebrew tribes made Exodus out of Egypt!
I believe that the language was the Algonquian Tongue (language) which was what our Woodland tribes spoke, there were different dialects spoken among our Algonkian Nation.
For further reading on this subject of Tecumseh may I suggest "TECUMSEH AN INDIAN MOSES" by Wm. H. Van Hoose, & A SORROW IN OUR HEART ; THE LIFE OF TECUMSEH by Allan W. Eckert, & PANTHER IN THE SKY by James Alexander Thom, & TECUMSEH, & TECUMSEH`S LAST STAND by John Sugden, & Tecumseh Shawnee rebel by robert Cwiklik.
Another great & helpful book I would recommend is INDIAN BLOOD ; FINDING YOUR NATIVE AMERICAN ANCESTOR (VOL.1, 2 ,& 3) BY Richard Pangburn which lists surnames that you can connect your ancestors surnames with, a wonderful sourcebook.
I believe that you can find some of these at your local library, & if they don`t have what you want you can have them do an interlibrary loan for you. I hope that this response has been helpful and you can reach me at my current E/dress.