It doesn't mean anything. It's just a last name.
I am German. It means beaver, there is no other translation for "bieber". But he doesn't know what German is anyway.
Bieber means hotness with a great voice!
Bieber is a German last name, from German High School ''Beaver''. Now I won't get so offended when people call him beaver!
My friend calls him Buber.
Apparently Justin doesn't even know if his last name means basketball or not!
I'd say it meant beaver.
Bieber means Justin Bieber's last name.
It's from middle high German biber - 'beaver'.
Guys stop insulting her already! Oops~
Er, his surname?
Wow, my sister's called him Justin Beaver for the longest time and now I know that that is what it really means.