Hello Mr. Hill,
I think you and I may have talked before on a different line (Charlotte Thompson/Alec Henley).
Will Harris was my g-grandfather. His mother was Caldonia Harris and his father was George W. Robertson. We don't know that they were ever officially married. Caldonia had children with 3 men: Tom Pyburn, George Robertson, and James Dove. The only one we know she married for certain was James Dove. Most of her children used the Harris surname.
Hope that helps :)
Donna O'Brien