The cognomen Maro is in origin a magistrate's title used by Etruscans and Umbrians, but cognomina were a recent fashion in the first century B.C. and were selected by parents of the middle classes largely by accident.

Sir,Since my last communication to you on the subject of the works, so commonly spoken of as by the "Great Unknown""the Wizard of the North," and other equally novel cognomina, the veil has been withdrawn; we now have the open avowal, both from his own lips, and under his own hand, of the authorship from the individual himself, who has so long, and, as it now appears, so justly, enjoyed the reputation of having written them.