Plant identification

Garden Elfin

Is anyone able able to identify this plant please? I have a number of them in the border and I have no idea what they are, but they are very pretty and delicate looking.

Thank you

Silver surfer

It is an Allium.

Looks like Allium cernuum.

https://www.google.co.uk/search?q=Allium+cernuum&rlz=1C1GNAM_en-GBGB687GB687&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjjtL3Jt8XVAhUELcAKHfN8DlgQ_AUICigB&biw=1536&bih=759

Garden Elfin

Thank you, I'm not sure how they got there, but now I know I won't pull them out.