I like
Rosario. I don't think I'd use it myself, but I like the sound and the feel it gives me (mature, a little frilly but not girly, strong, almost mystical in a very grounded way). Usually I prefer it as a mn, but it's good as a fn too.
I like
Rosario Eva,
Rosario Helena (HEL-en-a? hel-E-na? I like the combo both ways),
Rosario Lucia,
Rosario Talia, and
Rosario Isabel.