Apparently you are unaware that the United Church of Christ is the new name for Congregationalist. The Church of Christ is the Fundamentalist continuation of the 1800 A. D. Campbellite revival, of which the Disciples of Christ is the liberal offshoot. They are Restorationists (that later diverged off to Mormons, Seventh Day Adventists, and by 20th Century Jehovah's Witnesses).