I can not connect him directly, but can offer clues to a branch of the Waller family that he might be part of.
Thomas Carr Waller (1732-1788) m. Sarah Ann Dabney (1740-1822) and among their ten children was a son named Dabney Waller (1772-1849) who m. Eliabeth Minor (1768-1832) and among their children was a Dabney Washington Waller (1804-1880) who m. Caroline Pleasants and among their children was a son, Dabney Jordan Waller who married but I do not have a name for his wife and only the name of one child, Edmund P.(Pinckey?) Waller.