Where is Quintilian from?

Meaning of the name Quintilian

From the Roman cognomen Quintilianus , earlier Quinctilianus , which was itself derived from the family name Quinctilius. A notable bearer was the 1st- century rhetorician Marcus Fabius Quintilianus, simply known as Quintilian in English.

Characteristics of the name Quintilian

How do we know this about Quintilian

(and is it secret spies?)

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