Exploring the mtDNA matches of my daughter today. I keep a mtDNA Tree(private) at Ancestry to study the ones which have an exact match because of the backwards mutation present at her 5th Gr Grandmother level. (mtDNA Haplogroup H3-T152C!) Our documentation is back to Nancy Combs Fleming[1797(NC/TN)-1881 TX ] who was the daughter of Mason Combs and his wife Dorothy. Dorothy would be the contributor of the mtDNA.
Research using mtDNA results is most useful when used to compare testers matrilineal lines in the hopes of answering a question. Were it not for the backwards mutation in our line, the genetic distance = 0 (zero) matches with ancestry in the same general area, and the groupings of matches I probably wouldn't be giving this much thought until a specific research question arose.
There are several groups within the exact matches who are in the TN / NC area in which our matrilineal line lived. In addition to our group of Dorothy Combs descendants there are about 4 other groups. I generally focus on two of the others in addition to my own.
A matrilineal line back to Rebecca Wallace b. 1782 MD d. 1816 VA
A matrilineal line back to Catherine Brewer b. 1809 NC d. 1890 AR
Today I was looking at Catherine's ancestry and where she had lived. The census record below is of Sylvanias Blackburn & family in 1830 Hickman Co TN. This was Catherine's husband. They lived with his parents but moved off to War Eagle Creek Arkansas not long after this census.
"United States Census, 1830," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHPM-BZV : 20 February 2021), Slvenins Blackburn, Hickman, Tennessee, United States; citing 254, NARA microfilm publication M19, (Washington D.C.: National Archives and Records Administration, n.d.), roll 176; FHL microfilm 24,534.