Susannah Fields Maness (Fields-1638) cannot be the daughter of the Cherokee woman Susannah Emory (Emory-136) and her white husband Richard Fields (Fields-988).
The Cherokee Susannah Fields was born about 1780. She married two white men, George Brewer and Thomas Foreman and was the mother of 15 children, born between 1800 and 1826: Aky Brewer, and Samuel, Nellie, Charles, William, Joseph, Sally, David, George, Thomas, Susan, James, Edward, and Elizabeth Foreman. [see Eastern Cherokee application # 8004, Eliza Horn. Image at: https://www.fold3.com/image/221334217, also Starr, Emmet. History of the Cherokee Indians. Oklahoma Yesterday Publications edition, Tulsa, OK. 1979. pp. 306, 310, 363-364. Digitized edition at https://archive.org/details/historyofcheroke00lcstar/page/n5.]
This family was Removed to Indian Territory in 1838 over the Trail of Tears in a detachment led by Hair Conrad and Thomas Foreman.
Susannah Fields Maness was a much older woman. She appears to be the wife of Revolutionary War soldier Seth Manis, DAR Ancestor # A073377. Seth’s pension application, filed from Tennessee, does not name a wife or children. DAR records list wife "Patsy" and several children, born in North Carolina between 1780 and 1800.
The 1840 census for Hawkins County, TN shows Seth Manis, age 70-80 and a woman, also age 70-80. "United States Census, 1840," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHYL-TXX : 18 August 2017), Seth Manis, Hawkins, Tennessee, United States; citing p. 235, NARA microfilm publication M704, (Washington D.C.: National Archives and Records Administration, n.d.), roll 526; FHL microfilm 24,546.