Phidon
From LSJ
θοῦ, Κύριε, φυλακὴν τῷ στόµατί µου καὶ θύραν περιοχῆς περὶ τὰ χείλη µου → set a guard over my mouth, Lord; keep watch over the door of my lips | set a guard, O Lord, over my mouth; keep watch over the door of my lips (Psalm 140:3, Septuagint version)
Latin > English (Lewis & Short)
Phīdon: ōnis, m., = Φείδων,
I a descendant of Hercules, to whom is attributed the invention of weights and measures, Plin. 7, 56, 57, § 198.