The name Lilah is a girl's name of Arabic, Hebrew origin meaning "night". Lilah is ranked #272 on our popularity charts and is often added to lists like Film Noir Baby Names and discussed in our forums with posts like "build a sibset with middle names".
From the experts:
Lilah may be a simple spelling variation of Lila—or you might think of it as a shortening of Delilah or an Anglicization of the Hebrew Lilach, which means lilac. Whatever the root, it's a beautiful and stylish name. The final h adds balance or creates needless complications, depending on your viewpoint.