In the entire world, Сіслей (Sisley 
, Сіслей 
) is a rare unisex forename. The first name Сіслей is habitual in Hong Kong, where it is a rare female name, the Democratic Republic of the Congo, where it is a rare male name, and Peru, where it is a rare epicene name. In absolute terms, this name is the most popular in the Democratic Republic of the Congo, Brazil, and Mexico. Likewise, Сіслей is the last name as well as the forename.