With my hopes up I took a look at your page but nothing fits for me. I have Vincent and his wife Nancy in the 1850 and 1860 census of Tennessee and the 1870 census of Indiana. I also have the death information of Vincent and everything states he was born in Tennessee. The death information also lists his father as William Allen.
I believe either William or his father married an Indian. The facial features were handed down to my grandmother. My father had some but not as distinct as his mother. I was hoping your page would lead me somewhere but I'll keep looking. Thanks so much.