Kevin Chant has an interesting role:
Now, I have had a few people ask me what a Product Owner actually does. Some say that it sounds like an architect role.
In reality, the role is one that’s mainly related to newer working practices like Scrum.
A Product Owners list of responsibilities include talking to all the stakeholders for you team in the business and organise the priorities on your backlog board.
The concept makes sense, though this is the first time I’ve heard of such a role for a tool the engineers use rather than a product offered for sale.