Now there's more circumstantial evidence.
Peter & Elizabeth had a daughter Dolly born 1810 in South Carolina. She married Lawrence Rickard.
James A. and Nancy Ann had a daughter Elizabeth born 1829 or so in AL. She married Jethro Harrell in 1849 in Tallapoosa County, AL.
http://files.usgwarchives.org/al/tallapoosa/vitals/marriages/brided-h.txt
In 1860 Jethro and Elizabeth are in Selma, Dallas County, AL, with son Thomas.
http://search.ancestry.com/iexec/?htx=View&r=an&dbid=7667&iid=4211181_00323&fn=Jethro&ln=Harrel&st=d&ssrc=&pid=16708718
In the 1870 US Census for AL, Jethro and Dolly Harrell are in Selma, Dallas County with son Thomas.
Dolly and Dolly.
Just another coincidence? I think not.