From one of those that has had to deal with many people of mixed race let me explain:
Edwards = full blood black
Luna = half blood black and white
Jones = one quarter or maybe one eighth black
Let me explain that Oklahoma has always been a vary diverse state. Probably half of us Okies have a black, an Indian, or both in our woodpile. Most of us, however, do not have a trio of evil little sobs in our family.