Google gives me "late Middle English: from Old French ethimologie, via Latin from Greek etumologia, from etumologos ‘student of etymology,’ from etumon, neuter

Google gives me "late Middle English: from Old French ethimologie, via Latin from Greek etumologia, from etumologos ‘student of etymology,’ from etumon, neuter singular of etumos ‘true.’". It doesn't give the fancy tree diagram though.