αὐλοφύλαξ

From LSJ

μηδενί δίκην δικάσῃς πρίν ἀμφοῖν μῦθον ἀκούσῃς → do not give your judgement on anything until you have heard a speech on both sides

Source

Spanish (DGE)

-ακος, ὁ
guardián de la casa, PCair.Zen.292.58 (III a.C.).