would you believe that the origin of etymology is uncertain?!

okay, probly not.
< Old French ethimologie, modern French etymologie, < Latin etymologia, < Greek ἐτυμολογία, < ἐτυμολόγ-ος: see etymologe v.
-oed online

by the way, if you'd like to try the newly relaunched oed site, see my post under Misc.