Here is a link to a Debardeleben Family site. This fellow may be of some help in ascertaining who Lt. A.M. Debardelen was and where he was from. The site claims a Henry Debardeleben was the first to migrate to Alabama and settled in Auatuga County. Henry was the son of Arthur Franz Debardeleben of SC.

http://www.mindspring.com/~debard/bardeleben.htm