John was the beloved and the most loving disciple. It was not often he said negative things so bluntly. But just before he was imprisoned in Patmos, he really disliked this character Diotrephes in
3 John 1:9 I wrote to the church, but Diotrephes, who loves to be first, will not welcome us. 10So when I come, I will call attention to what he is doing, spreading malicious nonsense about us. Not satisfied with that, he even refuses to welcome other believers. He also stops those who want to do so and puts them out of the church.
I understand that at the time, there was only one church in one city. Diotrephes seemed to have a lot of power in the city church. Is there anything else we know about this guy?