A Persian word meaning “governor” (Nehemiah 8:9). “Attharates” is a different spelling of the title Tirshatha. In the Apocrypha, it is written as a proper name (1 Esdras 9:49). (The Apocrypha is a set of ancient texts not included in the Hebrew Bible but accepted by some Christian groups.)
Attharates
From Tyndale Bible Dictionary, adapted by Mission Mutual. CC BY-SA 4.0.