ἐξ ὀνύχων λέοντα τεκμαίρεσθαι → judge by the claws, judge by a slight but characteristic mark, small traits give the clue to the character of a person, deduce something from a small indication, identify a lion from its claws
[Seite 1105] v. l. für εὔτυκος, Aesch. a. a. O.
-η, -ο (Μ εὔτυχος, -ον)
ευτυχής.
[ΕΤΥΜΟΛ. < ευ + -τυχος (< τύχη), πρβλ. δύσ-τυχος, κακό-τυχος].