Epidicus

From LSJ

κέρκος τῇ ἀλώπεκι μαρτυρεῖ → you can tell a fox by its tail, small traits give the clue to the character of a person

Source

Latin > English (Lewis & Short)

Ĕpĭdĭcus: i, m.,
I the name of a comedy of Plautus, taken from that of a slave, who is one of the characters.

Latin > French (Gaffiot 2016)

Ĕpĭdĭcus,¹¹ ī, m., nom d’homme ; titre d’une pièce de Plaute.