This may not be your Wynns, but it's worth doing some research on the family. Are you sure that the name is J S? Could it be J L?
Looking at the Wynns that are living near J S Wynn on the 1900 Dodge Census are:Q L Wynn, born June 1876, married to A Mollie with son Homer; R B Wynn born 1859 and wife Martha. The handwritting on the 1900 Dodge Census is hard to read, the Ls and Ss like alike.
The Q L Wynn is Quinn Lamar Wynn, born June 2, 1876 and living in Dexter; Laurens Cty Ga in 1918. (WW II draft registration.)
On the 1880 Wilkinson Cty Ga census is this family: 342 345 Wynn, Jasper L, 37 Amanda 29, wife Elizabeth 10, dau James J, 9, son Lou??er, 6, dau Quinn L, 4, son Dora C, 10/12, born Au?, dau
Jasper appears to be son of James and Winny Wynn from the 1850 Wilkinson Census.