Mithredath in the Bible Encyclopedia - ISBE
mith'-re-dath (mithredhath; Persian = "gift of Mithra" or
"consecrated to Mithra"):
(1) The Persian treasurer through whom Cyrus restored the
sacred vessels to the returning Jewish exiles (Ezr 1:8).
(2) A Persian, perhaps an official, who was associated with
Bishlam and Tabeel in corresponding with Artaxerxes concerning
the restoration of Jerusalem (Ezr 4:7). In 1 Esdras 2:11,16,
the name is written MITHRADATES (which see).