Interestingly there is this family in Screven County in 1900:
(Jenkins county formed 1905 from Bullock, Burke, Emanuel, Screven)
Name: Lewis Kelsy
Home in 1900: Militia District 34, Screven, Georgia
Estimated birth year: abt 1841
Relationship to head-of-house: Head
Spouse's name: Lizzie
Occupation: View image
Neighbors: View others on page
Household Members: Name Age
Lewis Kelsy 59
Lizzie Kelsy 23
Hays Kelsy 2
Alice Kelsy 2.12
He seems to be with what looks like a very young wife.
I would keep him as a strong possible as a father/uncle/relative for your Lewis.