Here in Lewis co Ky we have all spellings . Some are listed as Biven/Bivin/Bivens and even some as Beavens. We can't get back pass James H and Mary Evans. we know James came from Md. Posibly Charles Co. I do have Henry N and Sarah Pitts in my family tree. Henry was born 1809 and died dec 21 1882 they were married on Oct 3 1827. Is this the same Henry that you have in your tree.