I believe that William and Mary Griffith were orphans raised by Eliza (Vanatta) Kiddoo, according to Eliza's obituary (see A History of the Kiddoo Family in the U.S. 1780-1981, p. 161-162; available online at BYU Harold B. Lee Library
http://www.lib.byu.edu/digital). Although this is only speculation and don't have any more information on them. Good luck with your research.