Descendants of Thomas Allen Dillaha of Little Rock, AR

As grandchildren of Thomas Allen Dillaha and Harriet Ella Wilkens, my cousins and I are attempting to trace our Dillaha roots back past Thomas Allen Dillaha's father, Robert Dillaha who was born in TN about 1818 and died in TN before 1875. Robert Dillaha was first married to Sarah Ann Self of Dickson County TN and next to Kizzie (?). We don't have much more information than that so far, but hope to find more.
In the meantime, we do have up to date information on the "tribe" created by Thomas Allen Dillaha and will be happy to pass along any of that.
On June 19, 2000, first cousins Ted Dillaha of AR (and son Theo Dillaha of VA), Janis Dillaha Young of CA, Carl Dillaha of TX and Sarah Dillaha Goalby of AZ will be attending the Dillehay Family Reunion in Red Boiling Springs, TN, in hopes of connecting to more Dillahas (any spelling) and more information, as well as a great time.

Any Dillaha clues, however remote will be greatly appreciated!