You can give group threads a custom name, whether it's simply your bothers' names "Joe & John", a practical reference like "Basketball Crew" or a clever nickname, it's a really nice touch.
How to Name a Group Thread
Open the group thread you'd like to name.
Click the initials at the top of the thread to open up the group details page.
Click EDIT
Click into the title line to change the name to whatever you'd like!