My mtDNA is, so far, an exact match for a Rebecca Hadaway 1797 to 1874, Georgia.
My earliest maternal ancestor and the source of my mtDNA is Mary Ann Holland born about 1821 or 1822 in Tennessee.
I can only assume that your Rebecca and my Mary Ann were related through their maternal side.
Do you have any records of a Mary Ann in association with Rebecca?
The family did live in Huntsville, AL off and on, but I cannot seem to find where Mary Ann came from. Any help or even remote possibilities are much appreciated.