My brother and I are currently using the same battlenet account because when he made his account I didn't think he'd keep playing, so I threw him on mine.
I was wondering if it'd be possible to remove his account <removed> from my battlenet so that he can merge it with his own?
These kinds of account transfers are generally not supported, Lectrinlol, even between siblings.
Your best bet would be to contact Account Services and explain the situation. You can do so via phone or email, and if they are able to facilitate your request they will gladly do so.