  We construct a family of simple gauge models in which three sterile neutrinos
become naturally light by virtue of a generalized seesaw mechanism involving a
chiral gauge symmetry. Examples where the chiral gauge group is SU(5)', SU(7)',
SU(3)' and/or their descendants are presented. A unified model based on SO(10)
x SO(10)' which embeds many of these models is constructed wherein three light
sterile neutrinos are just as natural as the three ordinary neutrinos. These
gauge models have relevance to current neutrino oscillation data, including the
LSND anomaly.
