Strictly speaking, Greg Kurtzer didn't start CentOS. He started cAos, and people within cAos started CentOS to bootstrap cAos. When the CentOS and cAos people couldn't get along, CentOS left cAos to be its own thing. Lance Davis probably has more claim to being the founder than Greg Kurtzer, as he was the one that started actually creating the Red Hat Linux rebuild work the led to CentOS.
Rocky McGaugh started building cAos-EL under the cAos Foundation which I created and led.
Due to my role with the cAos Foundation, I was part of the planning, inception, architecture, setup, leadership, management and led the project itself, but Rocky did 99% of the engineering work for cAos-EL-2 (later renamed to CentOS-3) and after Rocky was working on that, John Newbigin started on what would become CentOS-2.
Lance was there since the early days of the cAos Foundation, and he suggested the name "CentOS" (and he squatted and held the domain from the Foundation, which was how he took over the project), and he got involved with engineering/development of CentOS-3 after Rocky passed away. While I would agree, he is a co-founder, he proved to be opportunistic and acted very unethically and has been further demonstrated with the open letter sent to him from Russ Herrold (another co-founder) and the rest of the CentOS contributors for going AWOL, still holding the domain, and taking the project donations for years.
CentOS split off from the cAos Foundation (501c3) due to Lance's stronghold on the domain. To be clear, the separation was not mutual but it was cordial and sugar coated for the good of the project. I always enjoyed being part of CentOS and working on Linux distributions so not being part of CentOS was hard on me. This is one of the reasons why I announced a new distribution (Rocky) within 2 hours of CentOS being killed off, I was excited to do a distribution again! You can also imagine how and why I setup the Rocky Enterprise Software Foundation different from the cAos Foundation to better protect the project(s).
One last point, just because I wasn't working on core engineering and development of CentOS doesn't mean I wasn't deeply involved for the first years of CentOS and not a reason to discredit my role as project leader and co-founder.
