Saly is of Hebrew origin, meaning 'peace'. It's a unisex name but is more commonly used for females. The name was popularized by the character Sally Bowles in the novel and film 'Cabaret', though its usage predates this.
The name Saly appears to have experienced a resurgence in popularity in the late 20th century and early 21st century, with no births recorded between 1962 and 1985.