I have noticed that several researcher of the James Coffel family have Sarah Wyatt recorded as his wife because of an error on a Tennessee marriage record of 1796. That record should read James Coffelt whose family lived in Greene County TN at the time of this marriage. Three of the Coffelt boys married into the Wyatt family: James to Sarah, Samuel to Rebecca and another to Susanna.
I found this information on Ancestry.com by looking up Samuel Wyatt, the father of this family. After his death there was a court case listing his entire family which is on this site. Also you can find the Coffelts,(father, Phillip and mother Eleanor Ryan) in Greene County TN.
And a thank you to Maryann for bringing this to my attention nearly 10 years ago.