I know what is a fork and I’ve used stolen word deliberately here.
You mean cafelog – I didn’t know that. But as I read about it, I’m sure it’s completely different situation, different circumstances:
As the development of b2/cafelog slowed down, Matt Mullenweg began pondering the idea of forking b2/cafelog and new features that he would want in a new CMS, in a blog post written on January 24, 2003.?Mike Little, a professional developer, became the first to comment on the blog post expressing interest to contribute.?The two worked together to create the first version of WordPress, version 0.70,?which was released on May 27, 2003.?Christine Selleck Tremoulet, a friend of Mullenweg, suggested the name?WordPress.
(https://en.wikipedia.org/wiki/WordPress)