This is my 2nd g. grandmother, but the only one for which I have no lineage. Eudora P. Moon's birth was listed as Vermont on one document. But I did searches for her parents on Ancestry and FamilySearch and came up with only "unlikelies." Ancestry suggested Elizabeth E. Fay Moon (1793-1862) in Stratton, VT. The trouble with this woman as Phinette Moon's mother: she would be in her 40's for Phinette's birth, plus, Phinette would be 12 for the 1850 US Census, but is NOT listed with Elizabeth in 1850 US Census or NY '55.
I pretty much went through every listing for Moons in Vermont in the early 1800's and came up with nothing. There were a few families in Rensselaer Co. , NY(where she was married twice, first to William R. Scriven and then to Hiland A. Main), which she could have belonged to, but, again, she's not listed in any early census before her marriage.