Ronja
Ronjerimie
Roo
Rooby
Rooikat
Rooikat (in Afrikaans. English is Redcat)
Rookie
Roommate
Roopis
Roopis Lert
Roosevelt
Rooster
Rooster-Roo
Root Beer
Ror
Rorschach Inkblot
Rory
Rory (aka Rors)
Rosabells
Rosalind
Rosalinda
Rosanna
Rosanna Banana
Rosario
Rosarita
Roscoe
Roscoe Rascalini
Rose
Rose Kennedy Cat
Rosebean