I started (Middle-earth) roleplaying with my friends when I was 11 or 12, and in the beginning we used our characters' name
everywhere, including our contacts. Actually I even signed an exam as Fundin once instead of using my real name... (But it was okay since it was elementary school.

)
Lommy was our GM and because it felt weird to call her by her NPCs' names, I think we just called her Thinlómien (yes the name dates that far back) or made up some other nice and friendly nicknames.
Bag End is a really cute name for home. But sometimes there might times when Mordor would be more accurate (although of course your cell might confuse it with 'mother', what with the way you Americans pronounce Mordor)...