What is a Johannite? Are they representatives of a continuous tradition that began with John the Baptist? Are they instead a group that began at a later date spontaneously as did the Mormons? Are there actually both or several types of Johannites? What do they believe? Do they think that the Baptist was Christ and Jesus was not? Do they believe that they were both Christs? Do they believe that John the Baptist was something more like a prophet or an apostle? Are there a range of different beliefs among different Johannite groups?
In general I think we can define Johannites as people who disagree with the Christian mainstream about the importance of John the Baptist. As to when they began or what they believe we need historical references.

cont’d at the link above