Among English-speaking people, Leila is pronounced Lay-La, just like Layla, Leyla, Laila, et al. If you want the other pronunciation, you use Lila, Lyla, Lilah, Lylah.
I like Leila, but far prefer Layla. The Leila spelling feels somehow old/elderly to me.
Before you criticize a man, walk a mile in his shoes. That way, when you criticize him, you're a mile away and you have his shoes!
Steve Martin