I think the is a unique name. It flows and sounds great! If I have a daughter the first name is going to be Jayden. After a friend.
I never even thought of Twilight when I saw this. That's a gorgeous name, if we didn't already have one picked out I'd take it lol.
Everyone will be quick to give opinions on the names you like, your better off going with a name you and your partner like and not tell others til she is here. We have kept ours a secret til our little girl is here to stop people telling us they dont like it etc. And ive not heard esmee before but i have never seen twighlight, just go for what you like...esmee is a gorgeous name.