Hello Carol, I'm not sure about all of John's children. In the 1900 Census of Dale County, Al., two of his daughter's lived with him and Effie. Pearler Foy Bynum (My Grandmother) and Zenobia W. Bynum, whom my mother was named after, are the only children I know of.
Do you think George named one of his children, Effie, after John's wife?
Do you live in Alabama? I can go to Barbour County and do some research.