I think he's saying that once you have a set of potential names, get some stock photos/pictures that match up to those names, and then pick a name that you like

I think he's saying that once you have a set of potential names, get some stock photos/pictures that match up to those names, and then pick a name that you like AND has cool stock photography. That will keep you from picking a name and then having to spend even more time picking photos that go along with your name.