I wouldn't say it was cruel to name your dd
Delilah, nor would it "curse" her. As you note
Delilah is becoming more popular and thus more mainstream. For example, I never thought
Scarlett would be so popular, but it has and so the GWTW associations fade as the name goes up the charts.
Personally, I'll never get the Biblical bad girl association out of my head. I equate it with
Jezebel. But I'm in the minority.
By the way, I love the names
Lorelei and
Lilith. So "bad girls" don't always get the thumbs down from me. :-)
What about
Demelza instead?