ἐθελόκαλος
From LSJ
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
English (LSJ)
ον, showing goodwill, Phld.Herc. 1457.11.
Spanish (DGE)
-ον benévolo, de buena voluntad Phld.Vit.11B.