Make it
Liliana ("lil-ee-AH-nuh") and it's lovely. I prefer less-is-more
Lily or
Lilia, but
Liliana is nonetheless a great classic. It has a slightly dangerous, mysterious feeling to it that I like.
Lilianna I would pronounce, "lil-ee-ANN-uh." I don't care for that at all. It's too similar to
Pollyanna. There's nothing exotic at all about Lilianna.