Surname Сіслей (Sisley 
, Сіслей 
) , in the entire world, is quite a rare last name. The surname Сіслей is characteristic of Australia, where it is a rare surname, New Zealand, and Peru. Not in comparison with a country's population, the name is most common in the United States, the United Kingdom, and Australia. Likewise, Сіслей is the forename as well as the last name.