Ah, I hoped that won't happen

I won't be around the next week to see the results. But I think I might post it anyway and just hope that my question will be once again one of those hard enough to guess

Let's see if I'll succeed.
What do those have in common:
Old Took
Bungo Baggins
Drogo Baggins
Gaffer Gamgee
Glóin
You may just keep guessing, and then we shall see.