great grandfather born in choctaw nation searching

[susanne]

my great grandfather was born in choctaw nation according to his daughter birth certif, but how can i find out out ,if he was born into a choctaw indian parents or if his non indian parents was just living there, in 1900 he was living in indian territory ,okla

[azzpenn3]

What is your great-grandfather's name? Need to know family names dates of birth and/or death, etc. I am interested in any Harris family names, or Prentiss family names.