Of Latin origin.
Derives from “rosa” meaning the flower rose.
During the Roman Empire the “Rosalia”, a festival inspired by roses, was celebrated in several locations, usually in May.
It was the name of 12th century saint. Santa Rosalia, also “La Santuzza”, is the patron saint of Palermo, in Italy and three town in Venezuela.
She was born of a noble family and chose to live as a hermit in a cave, on Mount Pellegrino.
Other forms of the name are Rosalie, Lia, Rozalia, Zala.