I like
Lilia Miriam and
Lilia Catherine. I think
Lilia is pretty. I didn't know it was in The Ten Commandments. Now, I want to watch it to see if I find it in there. LOL. They might call her
Lily, but for the most part, I think they'd just call her
Lilia. I don't see any pronounciation troubles. I'd say it the way you said it. I don't forsee any confusion. (LOL, excuse my spelling).