ETYMOLOGY
from Greek αὐτεξούσιος (free will) + -ous
EXAMPLE
“…For First, as to Moral Evils, (which are the Chiefest) there is a Necessity that there should be Higher and Lower Inclinations in all Rational Beings Vitally United to Bodies, and that as Autexousious or Free-willed, they should have a Power of determining themselves more or less, either way…”
From: The True Intellectual System of the Universe
By Ralph Cudworth, 1678
Lexicophilia 