Hola, I am a kickapoo tribal member we are neighbor of the negros mascogos of coahuila. I barerly remember a Lady by the name of Maria Ana don't know her last name she was living with a kickapoo man but never have family with what i understand that she was stay with us after he pass away I think you should try to contact the negros mascogos. This Maria Ana I remember was very old she was always visits my great grandmother and helper around the house. The sad part is my great grandmother pass away 33 yrs ago. But there is hope that maybe some one else remember her I will ask the elders around ok. Other part we the Kickapoo's never really get to registered till early 1960's we started get our birth certificates. Maybe the mascogos get there birth certificates early than us.since there where living as afromexicanos before.