This is the first I have heard of Hattys in Louisiana, but nothing surprises me anymore. How did they end up in LA? The Hatty clan in Detroit went from Lebanon to New Brunswick, Canada. Then to Wheeling, West Virginia; Martins Ferry,Ohio, and finally, Detroit.
Yesterday, I went to the cemetery, and took photos of several of the Hatty headstones. It was very moving.
None of your names sound familiar, but I wouldn't rule out a connection. Might have to go back to Lebanon to find it, though!