See the popularity graph below for the name Theo? It's been heading straight uphill since 2010, when it hopped back onto the Top 1000 after a 60+ year absence.

Lilith is derived from the Akkadian word lilitu meaning "of the night." In Jewish folklore she is portrayed as Adam's rejected first wife, who was turned into a night demon for refusing to obey him. Lilith is unrelated to most other Lil- names, with the exception of Lilita, which is the Latvian variation.

It's a long time now since this casual but suave name was linked to velvet-throated, cardigan-sweatered singer Perry (born Pierino, son of Pietro) Como's day... and this could be the moment for a reassessment. Other Perry associations are designer Ellis and the fictional Perry Mason and Perry White. There is also the option of taking the long way round to Perry via the more substantial Peregrine or Percival.

The rise of the the various Isabel names may give a boost to this variation, which has a sunny, springtime feel.

Cute short form of Esther, now associated with the iconic nail polish brand.