Rosita
Rosannah
Roslyn
Then I googled and found
Rosette, Rosena, Rosa, Rosaleen,Rosalia,, Rosalin, Rosalina, Rosalind, Rosaline, Rosalinn, Rosalynn, Rosanie, Roselia, Roselina, Roseline, Rosella, Roselle, Rosena, Rosenah, Rosene, Rosetta, Rosette, Rosey, Rosheen, Rosie, Rosina, Rosine, Rosio, Rosita, Roslyn, Rosy, Roza, Rozalie, Rozaline, Rozalyne, Roze, Rozele, Rozella, Rozene, Rozina, Rozsa, Rozsi, Rozsika, Rozy, Ruza, Ruzena, Ruzenka, Ruzha, Ruzsa and Zita.

ETA: Wow that winky emoticon is just all levels of wrong isn't it?