First time I have seen a reference linking the Lankford and Abney families.
My great-grandfather Toombs Madison Lankford d. ca. 1920 (named for Robert Toombs of Georgia) was a minister from the Westminster SC area but we have not researched his connections in any detail.
We know of the family link between the Abneys and the Henry Madisons and were curious as to any Lankford family connection here to these Abneys that might explain the Madison middle name.
(Also have noted the Benjamin Lankford's daughter Anne's marriage to Ambrose Maddison in Pittsylvania Co. - this would explain a line of surnamed Maddisons with Lankford maternal link, but not a line of surnamed Lankfords with Madison or Maddison maternal descent.)