Γναθωνάριον

From LSJ

νᾶφε καὶ μέμνασ' ἀπιστεῖν → keep a clear head and remember not to believe a thing (Epicharmus fr. 250)

Source

Spanish (DGE)

-ου, ὁ dim. de Γνάθων Gnatoncito Longus 4.16.4.