Thread:Monolith616/@comment-4651179-20180930013133/@comment-26066818-20180930015059

I think it comes from the following quote:

"Merlyn's secretive nature often meant that individual Corpsmen did not know they were members of a larger organization, though those from realities more aware of the Omniverse often learned of the Corps in time..."

So the implication is that anyone who was given powers by Merlyn and Roma was considered a member of the Corps, even if they didn't know the Corps existed. It also specifically mentions that Merlyn and Roma used "a myriad of guises and methods" in addition to the choice between the Amulet and the Sword, so even "Captain Britains" were weren't created in that method could still be Corpsmen. For instance, it mentioned Captain Britain-1610 as a Corpsman, even though the Ultimate Universe's European Defense Initiative's super-soldier program wasn't noticeably connected to the Omniverse, that I remember.

However, while it does indicate that (1) any Captain Britain or analog character could be a Corpsman without knowing it and (2) Merlyn and Roma's involvement may not be obvious, it doesn't necessarily follow that (3) ALL Captain Britains are Corpsmen. The entry doesn't state that every incarnation of Captain Britain throughout the multiverse/Omniverse could have only come from Merlyn and Roma's intervention.

So, unless they are explicitly listed in A-Z #2 or identified as a Corpsman elsewhere, I'd say every single given Captain Britain is not confirmed a Corpsman based on A-Z #2 alone.