  Heavy singlet neutrinos admit Majorana masses which are not possible for the
Standard Model particles. This suggest new possibilities for generating the
masses and mixing angles of light neutrinos. We present a model of neutrino
physics which combines the source of lepton number violation with the flavor
symmetry responsible for the hierarchy in the charged lepton and quark sector.
This is accomplished by giving the scalar field effecting the lepton number
violation a nonzero charge under the horizontal flavor symmetry. We find an
economical model which is consistent with the measured values of the
atmospheric and solar neutrino mass-squares and mixing angles.
