Rosebean (from a book by John Lennon)
Rosebud
Roselily
Rosemary
Rosencrantz (from Rosencrantz & Guildenstern are Dead)
Rosey
Rosi
Rosie
Rosie Derrida
Rosita (after Joey's chair in Friends)
Ross
Ross (from the TV sitcom "Friends")
Ross (from the tv-series "Friends")
Rossa
Rossalini
Rossini
Rostislav
Roswelle
Rot
Rothschild
Rotten
Rotten Little Kitty
Rouge
Rouhilio
Roussi
Route 3
Roux
Rouxamond
Rouxster
Rover