Lets see...Remus' full name is Remus Kibbyashi Maru...we do call him a lot of nicknames though!

Remash
Kibbyashi
Kibby kat
Dork
Fuzzbutt
Fuzzbrain
Retard *When he is being reeeally nawtee, and he knows it too!*
Remoose
Cat *that is reserved for when he is trying to distroy my computer lol, he HATES it when I call him that*
Mr. Maru *kind of like the evil "hello Mr. Bond"*
R.K.
Remus Bear *from Hannah *
Remus butt