I checked on Wikipedia, and we all known it is obviously not always reliable. But it said a few middle names of the children in the epilogue that were not already known...to me, anyways:
Rose Alivia Weasley, Hugo Arthur Weasley and Roxanne Abigal Weasley
Now I know this can't be right because I went crazy trying to find out info. There has been no middle names confirmed other than the 3 Potters and Scorpius.
So then I got thinking - "How about I think up some names?" And, here is this thread! Post what you think the middle names should be. You can even change some ones that have been confirmed if you'd like! If so, add a description.
I'll post what I thought later!
~Monica♥♥