Patrick Debois is the person who named DevOps. A Belgian IT consultant, his movement contribution is primarily institutional and community-building rather than theoretical — he created the event and social infrastructure through which a diffuse set of practices and ideas coalesced into an identifiable movement.
Debois had been working on the integration of development and operations practice for years before the naming. His interest came from painful experience: as a consultant he frequently witnessed the dysfunction at the dev-ops boundary, with development teams optimizing for feature velocity and operations teams optimizing for stability, at cross-purposes.
The pivotal encounter came at the Agile Conference in Toronto, August 2008, where andrew-clay-shafer had posted a birds-of-a-feather session on "Agile Infrastructure." Only Debois attended; the session itself fizzled but the conversation between Debois and Shafer continued, establishing the conceptual frame of applying Agile principles to infrastructure and operations.
The term "DevOps" emerged pragmatically. Debois organized the first devopsdays-conference in Ghent, Belgium, October 2009. He wanted a Twitter hashtag for the event, but "DevOpsDays" exceeded the character limit. He shortened it to "DevOps." The name, coined for logistical reasons, stuck and named the movement.
The Ghent event itself was small — roughly 60 attendees — but it brought together the threads: the web operations practitioners who had been developing continuous deployment at Flickr and elsewhere, the Agile community members interested in extending Agile to operations, and the infrastructure automation developers working on tools like Puppet and Chef. john-willis was the only American present.
Debois co-authored the-devops-handbook (2016) with gene-kim, jez-humble, and john-willis, which gave the movement its primary systematic reference text. His contribution to the handbook reflects his institutional role: he is the movement's connector and community builder, not its primary theorist.
The devopsdays-conference series that Debois founded became the movement's community institution — running dozens of events worldwide annually, with an "open spaces" unconference format that allows the community to set its own agenda. This format, borrowed from Open Space Technology, is particularly appropriate for a movement that defines itself by cross-functional collaboration.
Debois is often called "the godfather of DevOps." This is accurate in the sense that he created the name and the first institutional home, though the intellectual substance of DevOps draws on the work of Allspaw, Hammond, Humble, Farley, Kim, and the lean/Agile traditions they synthesized.