David Bunton gives her birth year as 1790, although I have seen it as 1782 in other places. She gave her age as 60 in the 1850 Census.
Name appears to be Ifee on digital copy of marriage record. Iva in 1850 Census. Itha in the 1860 Census. She had an Indian name - Sookotosh - according to family lore. Some of the family traditions say that John Renta Baker married an Indian woman after killing her husband and this child was hers (or theirs). Some say she was an adopted Indian child. She would appear to be much younger than his other children and probably too young to be a child of Elizabeth. However, there is a family letter stating that she was the daughter of an Elizabeth, probably Elizabeth Terrill or Pherrill. It is possible, too, that Elizabeth, mother of Iffa, was a much younger wife of John Baker. My own DNA studies for racial lines indicate that I have no Indian heritage whatever, but that I am descended from Iffa seems certain as I have a DNA matches to descendants of John Baker via different children. As the DNA results are being changed - 23andMe suggests (speculatively) that I have .1% East Asian/Native American heritage. Ancestry picks up as a trace region as southern Asia which is not the same as East Asian/Native American. FamilyTree DNA picks up none in Asia. Geno2, National Geographic's Genographic Project shows only the southwest Asian region - the Middle East - which is expected.
From Madison Co. Marriage License File No. 5, 1806-1807
1850 Estill Co. Found in Census, Iva Harrison, age 60, born S. Carolina, living next door to son William. Living with her is Sally, age 20, Rachael age 15, Mathew age 2. Sally was the youngest daughter as far as is known. I'm not sure who Rachael is unless there was indeed another child. Mathew, quite possibly, Sally's child. If her birthdate as passed along from David Bunton is correct, Iffa was about 50 when Sally was born, and the chances of Rachael being her child are slim.
1860 Jackson Co KY - "Itha" lives with her youngest son William and his family.
It should be noted that in 1850 and 1860, Iffa is noted as unable to read and write; probably could not write her own name, nor spell it. One of the reasons her correct name is impossible to determine. Nicknames were common in the families, time, and place in which she lived and I think we can safely assume she did use a nickname.
IFFA BAKER and ELISHA HARRISON were married on 28 August 1805 in Madison County, Kentucky.8 ELISHA HARRISON9, son of JONATHAN HARRISON and MERCY TERRY, was born about 1780 in Botetourt County, Virginia.7 He died in 1848 at the age of 68 in Estill County, Kentucky.7
Marriage Bondsman, James Baker. Consent by father of the bride - John Baker
In 1800 an Elisha Harrison was living in Nelson County, Kentucky - it is a tax list and may or may not be this man. He would have been only about age twenty.
1820 Madison Co KY Census; p.142:
1830 Madison Co KY Census. Only Harrison in the county. p.93
I did not find Elisha in 1840 - perhaps they were living with one of the married children. They did not seem to be with the two eldest sons, John B. & George, who are found in Madison Co in 1840.
IFFA BAKER and ELISHA HARRISON had the following children: