The name is the English form of the Latin, Placidus, meaning “calm; placid.”
The feminine form of Placidia was borne by the daughter of Emperor Theodosius I.
The name was never very common in the English-speaking world, however, it was occasionally used by the Puritans.
Other forms the name include:
Feminine forms include:
The designated name-day throughout Europe is October 5.
The name is borne by 6th-century Italian monk, St. Placido; 17th-century English Protestant Minister, John Placid Adelham; 20th-century Catholic Indian theologian, Father Placid J Podipara; world famous Spanish tenor and opera singer, Plácido Domingo.