mit.re.dat is a personal name borne by a treasurer and by a writer among associates in Ezra.

The supplied verses use the term as a proper personal name in two distinct narrative settings: a treasurer who handles items for Cyrus, and a named participant among those who write to Artaxerxes.

1. Named treasurer handling brought-out items · dominant

   In Ezra 1:8, the form is tagged Noun · Proper and occurs in the clause identifying the treasurer through whose hand the items were brought out; the APB renders “by the hand of Mithredath the treasurer.”

   Ezra 1:8
2. Named member of a group of letter writers · occasional

   In Ezra 4:7, the form is tagged Noun · Proper among Bishlam, Tabeel, and associates who wrote to Artaxerxes; the APB renders “Bishlam, Mithredath, Tabeel, and the remnant of his associates wrote.”

   Ezra 4:7

In the Anselm Project Bible: The APB presents the name directly in both verses: as “Mithredath the treasurer” in Ezra 1:8 and among those who “wrote” in Ezra 4:7. These are verse-level presentations, not definitions.