I think
Liliana is all right. It's a little too frilly for me though. I prefer
Liliana to just
Liana. I'm not sure lee-lee-AHN-ah would work. It might just be me, but I find the pronunciation lil-ee-AHN-ah comes more naturally, with the beginning part sounding like the name
Lily.
Liliana CelesteLiliana RhiannonLiliana MaireLiliana FlorenceLiliana ClaireLiliana Bethany