The name Sisley is a girl's name of English origin meaning "blind". Sisley and is often added to lists like Designer Baby Names and discussed in our forums with posts like "Makeover 10 times".
From the experts:
Sisley is a fashion-oriented spelling of Cicely or Cecily, which in turn is a variation of Cecilia. All these names including Sisley have many spelling twists: This one could also be Sisely or Sicily. But really, Cecily is better, and Cecilia (or Cecelia) better still.