They would potentially be for real kids, I plan on adopting, and if all goes according to plan (which it may not) and I don’t change my mind (which I probably will) these will be the names I give my children.
I’m not sure what style exactly I’m going for, some other names I like, that I think could go well with Graham could be Daphne, Arthur, or Chester. Though I’m not sold on using any of those. Due to the fact that Daphne has that same -ee ending as Romilly and Briony, and Mercer shares the -er sound with Arthur and Chester.
This is not, however, an urgent thing by many means. It will be many years before this is even a possibility.