I'm presuming Lailah is either pronounced LIE-lah or LAY-lah. Either way, I think the spelling Lailah is terrible. If it's LIE-lah, then I like
Lila or Lyla and if it's LAY-lah, then I like
Layla.
Claire is ok,
Jane is nice and
Sierra is not really my style. I would prefer
Sienna.