On the 1900 census for Isaac Courtney and family, I see the daughter's name (b. Apr 1885) as Alafair.
It looks like in the 1900 census, Isaac Courtney states that he and Peggy have been married 33 yrs, which would make their marriage about 1867. It also shows Isaac had step-children, which I assume to be Peggy's children, in that 1900 census.That doesn't work right according to the 1870 census for Barnwell Co., which shows Isaac living as a laborer or servant in another household, and Peggy is with 3 children under the surname Wright:
1870 August, Barnwell Co., Bennett Springs
Peggy Wright, age 22, cook woman, black, b. SC, cannot read, cannot write
Cudjo Wright, age 6, male, b. SC
Molly Wright, age 4, female, b. SC
Savannah Wright, age 2, female, b. SC
Savannah is shown in the 1880 census as "Vanna Jackson" and her siblings are shown in that 1880 census as Cudgeo Jackson, Molly Jackson, and another female named Margaret Dunbar.I haven't figured out where Margaret fits into the picture.Since, in the 1880 census, Miley Courtney is age 9, which would make her born about 1871, I think it more likely that Isaac Courtney and Peggy Wright married after August of 1870.Isaac is in the 1870 census, enumerated 5 July, as:Isaac Courtney, age 35, cannot read or write, "cuts timber," b. SC (he's living with the Henry and Barbara Radical family near post office).
(NOTE:It doesn't connect to your family, but on the page of the census just prior to the one showing Peggy in 1870, it lists a family including a 105 year old African American woman named Maria Dunbar, and for occupation it says "with white friends."Another woman is described as a "milk woman."The 1870 census records in the south have unique designations like this.)