Choctaw Nation of Oklahoma

My name is Melissa (Ater) Jackson-Kuenzi I’m searching for information about the Hayes family.I have been searching for quite some time now.I just found out that my great-grand parents are Robert and Eunice or Evnice Hayes. I did find my great-grand father on record.But I really don’t know anything about my fathers side.
What I do know is Robert and Eunice Hayes had children and one is my grandma Bucella Ezelle Hayes (Ater).Then she married Samuel Ater,my grandpa.Then they had 3 children, Sue , Janice and Steven(my father).I really don’t know any thing other than that. I don’t know any birth dates for my great-grand parents or where they were born, except they are from Oklahoma,then moved over to California.
I don’t know any of my relatives from the Hayes side to ask them,I know that both of my great-grand parents are Choctaw and that Robert was a medicine man(I think).But he was someone who was highly though of.My mom had told me that he might even been a chief, I really can’t say so.
My grand mother lived in Chula Vista ,Ca and she passed away when I was about 5yrs old.So I really didn’t know her,but I’m told I take after her alot..

But looking for any info and any relatives that are out there who could help me.