The Collaborative International Dictionary of English v.0.48:

Havior \Hav"ior\ (h[=a]v"y[~e]r), n. [OE. havour, a corruption
   of OF. aveir, avoir, a having, of same origin as E. aver a
   work horse. The h is due to confusion with E. have.]
   Behavior; demeanor. [Obs.] --Shak.
   [1913 Webster]