Elizabeth Coleman (Brown) - Correct Mother for Rachel (Coleman) Blankenship?

The information I've found for the mother of Rachel (Coleman) Blankenship is that her mother's name was Elizabeth but no maiden name is given. There are a LOT of children connected to this Elizabeth (Brown) Coleman and shows her having married two Coleman men. I'm not convinced she was the mother of Rachel (Coleman) Blankenship. It's possible she wasn't even the wife of two men with the Coleman surname. Does anyone have any documentation other than what someone has in their Ancestry tree to prove her connections? I clicked on the links in the 'About' section and one is the same site where I've seen that Rachel's mother's maiden name is unknown. The other links all go to the same site that has many, many links to have to wade through, so I never saw anything relating to these connections.