The boy's name Placidus \p-laci-dus, pl(a)-cidus\ is a variant of Placido (Spanish), and the meaning of Placidus is "clam, serene".
The baby name Placidus sounds like Placydo, Placyd and Placedo.
Placidus is a very rare male first name and a very rare surname (source: 1990 U.S. Census). Displayed below is the baby name popularity trend for the boy's name Placidus. Compare Placidus with related baby names.
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