Plato, Cratylus 399c
“Here is what the word human (anthropos) means: no other animals examine, consider, or observe closely those things which they have seen, but a human, as soon as he has seen something – that is, “opope” – he observes closely and considers that which he has seen (opopen). Therefore, humans alone of all animals rightly deserve the name “anthropos”, because they observe closely what they have seen (anathron ha opope).”
σημαίνει τοῦτο τὸ ὄνομα ὁ ‘ἄνθρωπος’ ὅτι τὰ μὲν ἄλλα θηρία ὧν ὁρᾷ οὐδὲν ἐπισκοπεῖ οὐδὲ ἀναλογίζεται οὐδὲ ἀναθρεῖ, ὁ δὲ ἄνθρωπος ἅμα ἑώρακεν—τοῦτο δ᾽ ἐστὶ τὸ ‘ὄπωπε’ —καὶ ἀναθρεῖ καὶ λογίζεται τοῦτο ὃ ὄπωπεν. ἐντεῦθεν δὴ μόνον τῶν θηρίων ὀρθῶς ὁ ἄνθρωπος ‘ἄνθρωπος’ ὠνομάσθη, ἀναθρῶν ἃ ὄπωπε
What about the lykopos, Plato? (eg the famous case of La Bête du Gévaudan in the 1760s.)