Origin of the name Leila: Derived from the Arabic leila (night, dark beauty) or the Persian leila (dark-haired). Its use in England began with George Byon's poem "The Giaour" (1813).
Lale or Laleh, is a Persian world meaning Tulip. Persian: لاله‎‎, IPA: [ˈɫale] or Lala (Russified version) which is also used as a feminine name in many countries besides Iran including Turkey.
Leila (Hebrew: לילה‎‎; Arabic: ليلى‎‎) is a feminine given name in the Hebrew and Arabic languages. Leila is the Arabic and Hebrew word for "night": laylah. ... In the Nordic countries, Laila or Lajla (pronounced lie-lah) is derived from the Sami name Láilá, the Sami variant of Helga which means holy.