User:SOTO/Forum Archive/The Panopticon/@comment-1296654-20200616211544/@comment-6032121-20200616231756

The thing about Aaron is — there is a degree of reasonable doubt in his case.

Namely, we don't know what Grace O'Brien's last name was before it was O'Brien, so it's not impossible that Sinclair was Ryan's mother's name, with her never actually having taken Aaron's name.

This is not the case with Gillian. There is literally no possible way, aside from ruthlessly convoluted fanfiction, that her name could be anything else than Who, once we accept know that Who was John's last name.