I don't know, is there any interesting precedent on this? I feel like if we were told that (say) Amy Pond, daughter of Augustus Pond and Tabetha Pond had an offscreen older brother called Preston, we wouldn't actually need a confirmation of the full name to put it at Preston Pond rather than Preston (Doctor Who and the Thought Experiment). I could be wrong. If a case like my thought experiment could be found, presumably not about as high-profile a character as Amy, that'd be grand, but I have no idea how to even start searching.
(I don't actually think the comparison to 'dancing' in The Doctor Dances is as apt as all that. I mean yes, it's an example of us exercising some common sense about stuff that is never voiced in so many words, but made explicit on other ways. But it's quite a different situation. If nothing else, that issue has nothing to do with page naming, even though that is its own set of conventions separate from what is speculation; it's not speculation that the guy from the ambulance was called 'Bruce Gerhardt', but it's still not good enough for it to be the page name.)