  We construct a class of supersymmetric SU(5) GUT models that produce nearly
tribimaximal lepton mixing, the observed quark mixing matrix, and the quark and
lepton masses, from discrete non-Abelian flavor symmetries. The SU(5) GUTs are
formulated on two five-dimensional throats in the flat limit and the neutrino
masses become small due to the type-I seesaw mechanism. The discrete
non-Abelian flavor symmetries are given by semi-direct products of cyclic
groups that are broken at the infrared branes at the tip of the throats. As a
result, we obtain SU(5) GUTs that provide a combined description of non-Abelian
flavor symmetries and quark-lepton complementarity.
