Ὅμηρον ἐξ Ὁμήρου σαφηνίζειν → explain Homer from Homer, explain Homer with Homer
Barrus: i, m.,I a cognomen of T, Betucius, Cic. Brut. 46, 169>
(2) Barrus,¹⁵ ī, m., surnom romain : Cic. Br. 169.