Gregorios N. Vernardakēs (Γρηγόριος Ν. Βερναρδάκης, 1848–1925) was a Greek classical scholar and professor at the University of Athens. He produced the monumental Teubner edition of Plutarch's Moralia in seven volumes (1888–1896), a landmark in the textual criticism of this vast and varied collection. Vernardakēs was a bold emender, sometimes controversially so — his willingness to alter the transmitted text drew criticism from more conservative scholars, but his deep knowledge of Plutarch's language and style informed many corrections that have been accepted by subsequent editors.

The Teubner series (Bibliotheca Scriptorum Graecorum et Romanorum Teubneriana), founded in Leipzig in 1849, is one of the two great critical text series for classical authors alongside the Oxford Classical Texts. Teubner editions typically feature a full apparatus criticus recording manuscript variants, conjectures, and editorial decisions. Vernardakēs's Teubner Moralia was the standard edition for decades, though individual treatises have since been re-edited in newer Teubner volumes and in the Budé series. His text is characterised by numerous bold conjectures, some brilliant, others rejected by later scholarship.