Prosper from the Latin name Prosperus, which meant "fortunate, successful". This was the name of a 5th-century saint, a supporter of Saint Augustine. It has never been common as an English name, though the Puritans used it, partly because it is identical to the English word prosper.
Saintly namesake: Prosper of Reggio was a 5th-century bishop known for his leadership in Reggio Emilia. He is one of several saints named Prosper and is celebrated for his dedication to his community. (June 25 · 5th century)
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Names related to Prosper through nicknames, language, or historical forms.