|Easton's Bible Dictionary|
Given by Mithra, or dedicated to Mithra, i.e., the sun, the Hebrew form of the Greek name Mithridates.
(1.) The "treasurer" of King Cyrus (Ezra 1:8).
(2.) Ezra 4:7, a Persian officer in Samaria.
Int. Standard Bible Encyclopedia
mith'-re-dath (mithredhath; Persian equals "gift of Mithra" or "consecrated to Mithra"):
(1) The Persian treasurer through whom Cyrus restored the sacred vessels to the returning Jewish exiles (Ezra 1:8).
(2) A Persian, perhaps an official, who was associated with Bishlam and Tabeel in corresponding with Artaxerxes concerning the restoration of Jerusalem (Ezra 4:7). In 1 Esdras 2:11, 16, the name is written MITHRADATES (which see).
Mithredath (2 Occurrences)
Ezra 1:8 even those did Cyrus king of Persia bring forth by the hand of Mithredath the treasurer, and numbered them to Sheshbazzar, the prince of Judah. (WEB KJV JPS ASV BBE DBY WBS YLT NAS NIV)
Ezra 4:7 In the days of Artaxerxes wrote Bishlam, Mithredath, Tabeel, and the rest of his companions, to Artaxerxes king of Persia; and the writing of the letter was written in the Syrian character, and set forth in the Syrian language. (WEB KJV JPS ASV BBE DBY WBS YLT NAS NIV)