Below is all I have on anyone named Fernandes in Fayette County, GA.The family was in Fayette County by 1838, as per marriage records.
Fayette County, GA, Tax Digests, 1823-1834, list no one named Fernandes or any variation thereof.
Fayette County marriages, Books A & B, 1822-1848, published list, show:
Evalina E. Fernander to Hezekiah D. McIntosh, 24 October 1838
Samuel S. Fernandes to Ann Russell, 4 April 1841
William Fernandes to Mary Palmer, 30 December 1845
Fayette County marriages, Book C, 1849-1871, published list:
No Fernandes/Fernander/Furnander, etc.
1830 Fayette County Census:No Fernandes by any spelling.
1840 Fayette County Census: Index list only, William P. Firnander in Capt. Hardman's District, census page 212.
1848 Fayette County Tax Digest lists Mary Furnander, Widow, with 10 slaves
1850 Fayette County Census:
Fernander, Samuel C., age 27, Born GA
Fernander, Samuel C., age 25, in HH of Samuel Thompson, age 35, and wife Pamela, age 33.
(The above are surely the same man listed twice.)
(Mary Fernandes is not listed in published census; may be in original MSS copy.)
(There is no one else by this name in the census)
1860 Fayette County Census:
Fernander, Mary, age 70, born NC
(No one else in HH)
16 Slaves (Slave Schedule shows her name as Fernandes)
(No other Fernandes, etc., listed in 1860)
Fayette County Will Book A, 1828-1897, index, lists no one named Fernandes or any variation thereof.
There may be something on William P. Fernandes in Fayette County Estate administrations.I have not researched those sources, but he left no will.Nothing I have suggests a wife other than Mary, but given their marriage in 1845 and her age, he certainly could have had a previous wife and it appears that he and Mary had no children together.
My theory that William Fernandes went to Fayette County when Zabud Little went to neighboring Henry County, both from Union County, SC, does not seem to hold up.Zabud Little was in Henry County by 1827 and was with the James McKenney Holderness and Margaret (Stribling) Welborn family because he married Clarissa (Welborn) Holderness's sister Dorothy Welborn in Henry County in 1827.This was well before William Fernandes went to Fayette County.No Fernandes appears in Zabud Little's land or estate records.Little and Fernandes families were neighboring landowners in Union County, SC, but that may be the extent of their association and the rest conicidence.
So in answer to your question, yes William Fernandes in Fayette County could have been married first to Harriett Bowers, but I have no record of the marriage and would suppose it took place in SC before he came to GA.
Does this answer anything?