I love Liljana. Gorgeous! And this is my favourite spelling of it too. Kalina i'm always on the fence about, it's nice, but something about the sound ruins it - i'm not sure what it is.
Tashana sounds very trashy -- and looks like "trash" too. I'd say that's a no-go. Kalina is sweet, and I adore the nickname Kallie. Liljana is lovely. I've liked that for a long time. Possible pronunciation issues.