[x] Initials

What are the rules for artists with initials in their name? I'm clear that J. Doe needs to be John Doe||J. Doe but what about John Q. Doe. If he's always credited that way is he:
John Q. Doe?
John Doe||John Q. Doe?
Jon Quincey Doe||John Q. Doe?

I've been doing the first one:

John Q. Doe

not out of any particular preference, but that's just how I think we have been doing it.

If he always appears as John Q. Doe, then he may remain that way without aliasing. We can go the extra distance to figure out what the initial stands for, but it's not necessary. J. Quincy Doe also would be fine if it occurred that way every time. J.Q. Doe would need detective work.

Fore-Play
3. Multiple forenames may be used as the name standard so long as all forenames appear in the relevant credits subject to The "The" Rules above.

6.Initials representing every forename of an artist are not accepted diminutive forms of forenames as the full names they represent are not colloquially intuitive.