vavasor \vav"asor\, n. oe. vavasour, of. vavassor, vavassour,
   f. vavasseur, ll. vavassor, probably contr. from vassus
   vassorum vassal of the vassals. see vassal. feud. law
   the vassal or tenant of a baron; one who held under a baron,
   and who also had tenants under him; one in dignity next to a
   baron; a title of dignity next to a baron. --burrill. "a
   worthy vavasour." --chaucer. also written vavasour,
   vavassor, valvasor, etc.
   1913 webster

         vavasours subdivide again to vassals, exchanging land
         and cattle, human or otherwise, against fealty.
                                                  --motley.
   1913 webster
see also:
vassal vavasour vavassor valvasor