achean

from The Century Dictionary.

• Pertaining to Achæa (Achaia) in the Peloponnesus, to the Acheans (Achæans, Achæi, or Achaioi), or to the confederacy called the Achean League.
• noun An inhabitant of Achæa (Achaia), or one of the ancient Greek people (Achaioi) from whom that country took its name.
• noun Also spelled Achaian, in closer imitation of the Greek.

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

• adjective See achæan, achaian.