I love this name, completely. Two good nicknames would be 'Rose' or 'Lena'. However, my sister has convinced me never to use this name after that annoying song 'Rosalina' from the Nickelodeon TV show 'The Naked Brothers Band'.
Rosalina is the name of Nintendo's newest princess. She makes her debut in Super Mario Galaxy for Wii as a main character helping Mario seach for Princess Peach (as usual). Her full title is 'Rosalina, Princess of the Stars and Mother to the Luma (a species shaped like a star with eyes).'
My family is Italian-American, and Rosalina was my great-great-grandmother's name, and my grandmother's name. I am also surprised to see that people think the name is overused. I have never heard of anyone else with it. I like it very much, and would consider using it for a future daughter.
This name is really uncommon. I've never met anyone with this name. The only Rosalina I know of is a character on the Naked Brothers Band played by Allie DiMeco. But I would like to know someone who really had this name. It's very beautiful, I loved it since I first heard it. And I don't think it's cutesy or childish. It's gorgeous.