The Chaldeans were a Semitic people of Arabian origin, who spoke Aramaic, who settled in southern Mesopotamia in the early part of the first millennium BC. The 11th dynasty of the Kings of Babylon (6th century B.C.) is conventionally known to historians as the Chaldean Dynasty. Chaldea, "the Chaldees" of the "KJV Old Testament", was a Hellenistic designation for a part of Babylonia. One early such reference is to the impending sack of Jerusalem by Nebuchadnezzar II (Habakkuk 1:6). The Hebrew name for ancient Chaldeans was Kasdim. http://www.crystalinks.com/chaldea.html See "The Chaldean Oracles of Zoroaster", See Oracle, Monad, and "The Chaldean Oracles", by G.R.S. Mead, http://www.gnosis.org/library/grs-mead/grsm_chaldean.htm