idumean

from The Century Dictionary.

• Of or pertaining to Idumæa or Edom, an ancient territory and kingdom between Palestine and Egypt, extending from the Dead Sea southward to the gulf of Akabah.
• noun A member of the race inhabiting ancient Idumæa or Edom, represented in the Bible as descendants of Esau; an Edomite.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Of or pertaining to ancient Idumea, or Edom, in Western Asia.