I love LAY-lah, spelled
Leila. But that can also be confusing (I thought for years
Leila was prn. LEE-lah).
Layla just looks trendy and a bit illiterate to me, and
Laila looks like it could be prn. LYE-lah.
I like these best:
Laila JoannaLaila GabrielleLaila ClaireLaila Elizabeth Laila Gretchen
Laila/Layla doesn't sound quite right as a mn, imo.