[name]Hi[/name], we are expecting our sixth child, our first boy. We already have 5 little girls: [name]Addison[/name] [name]Kate/name, [name]Macy[/name] [name]Raegan/name, [name]Savannah[/name] [name]Mae/name, [name]Lilah[/name] [name]Belle/name, and [name]Shelby[/name] [name]Grace/name. We are from Arkansas so we want our son to have a southern name. We want it to be a strong and classic southern boys name. We were think maybe [name]Rhett[/name] [name]Thomas[/name], but we still would like suggestions. Thank You!
I like [name]Rhett[/name], it’s really nice. The t sounds run together a bit, but I don’t think that’s a big deal. [name]Thomas[/name] [name]Rhett[/name] is nice too. My son’s name is [name]Everett[/name], nn Rett sometimes, if you are wanting something longer. Sorry, I’m not great at suggesting names, but I’m interested in seeing what everyone comes up with. [name]One[/name] name I’m considering for baby number 2 is [name]Boone[/name], but I don’t know if that fits what you’re looking for or not. Congrats on your boy!
I almost fell over when I saw [name]Rhett[/name] [name]Thomas[/name]! Absolutely completely stunning!!!
Congrats on your pregnancy! Wow, five daughters and now a son! Without knowing your surname and your definition of “Southern”, here are some suggestions for names I think of when I hear the term. I guess they could be described as “country and western” too! 
[name]Wyatt[/name]
[name]Earl[/name]
[name]Amos[/name]
[name]Josiah[/name]
[name]Quentin[/name]
[name]Cooper[/name]
[name]Leland[/name]
[name]Emmett[/name]
[name]Porter[/name]
[name]Jackson[/name]
[name]Eli[/name]
[name]Cyrus[/name]
[name]Otis[/name]
[name]Raleigh[/name]
[name]Colton[/name]
[name]Logan[/name]
[name]Spencer[/name]
[name]Abel[/name]
[name]Jabez[/name]
[name]Jethro[/name]
[name]Tobias[/name]
[name]Asa[/name]
[name]Joshua[/name]
[name]Silas[/name]
[name]Barnaby[/name]
[name]Blake[/name]
[name]Wade[/name]
[name]Vernon[/name]
[name]Shane[/name]
[name]Oakley[/name]
[name]Troy[/name]
[name]Sterling[/name]
[name]August[/name]
[name]Ulysses[/name]
[name]Clifford[/name]
[name]Amory[/name]
[name]Preston[/name]
[name]Clarence[/name]
[name]Chester[/name]
[name]Virgil[/name]
[name]Grant[/name]
[name]Lance[/name]
[name]Jeremiah[/name]
[name]Duke[/name]
[name]Sawyer[/name]
[name]Alden[/name]
[name]Bennett[/name]
[name]Dwight[/name]
[name]Forrest[/name]
[name]Holt[/name]
[name]Garrison[/name]
[name]Prescott[/name]
[name]Wesley[/name]
[name]Stanton[/name]
[name]Neville[/name]
[name]Duane[/name]
[name]Homer[/name]
[name]Jared[/name]
[name]Seth[/name]
[name]Roscoe[/name]
[name]Cletus[/name]
[name]Burl[/name]
[name]Enoch[/name]
[name]Lloyd[/name]
[name]Travis[/name]
[name]Clyde[/name]
[name]Franklin[/name]
[name]Winslow[/name]
[name]Tucker[/name]
[name]Jesse[/name]
[name]Beau[/name]
[name]Bayard[/name]
[name]Ansel[/name]
[name]Mason[/name]
[name]Harlan[/name]
[name]Lorne[/name]
[name]Dalton[/name]
Congratulations! I absolutely love your girls’ names, and I think that [name]Rhett[/name] [name]Thomas[/name] would be so handsome. I love the suggestions of [name]Everett[/name] and [name]Boone[/name], as well (and half of @mischa’s list!).
What about (sorry for repeats!):
[name]Samuel[/name]
[name]Henry[/name]
[name]Brody[/name]
[name]Jameson[/name]/[name]James[/name]
[name]Lucas[/name]
[name]Felix[/name]
[name]Andrew[/name]
[name]August[/name]
[name]Jack[/name]
[name]Leo[/name]
[name]Avery[/name]
[name]Grayson[/name]
[name]Zane[/name]
[name]Peyton[/name]
Good luck!
These are all sort of southern (or maybe more cowboy, varying by each) that I think are also cool:
[name]Jasper[/name]
[name]Dalton[/name]
[name]Cash[/name]
[name]Earl[/name]
[name]Owen[/name]
[name]Wyatt[/name]
[name]Emmett[/name]
[name]Luke[/name]
[name]Jackson[/name]
[name]Colton[/name]/[name]Colt[/name]
[name]Wade[/name]
[name]Clayton[/name]/[name]Clay[/name]
[name]Huck[/name]
[name]Preston[/name]
[name]Duke[/name]
[name]Sawyer[/name]
[name]Holden[/name]
[name]Wesley[/name]/[name]Wes[/name]
[name]Jefferson[/name]
[name]Travis[/name]
[name]Lane[/name]
[name]Clyde[/name]
Lots of great suggestions here. [name]Just[/name] wanted to comment that I like the name you have…[name]Rhett[/name] is definitely a handsome, strong, southern name!